A ball was thrown off a bridge. The table relates to the height of the ball above the ground in feet to the time in seconds after it was thrown. Use the data to enter a quadratic model in vertex form and convert it to standard form. Use the model to find the height of the ball at 1.5 seconds.
Answers
The peak height reached at 144 feet, and the graph passing through points (0, 120), (1, 144), (2, 120), gives;
1. The vertex form of a quadratic equation is f(x) = a•(x - h)² + k
Where;
a = The leading coefficient
(h, k) = The coordinates of the vertex.
Let t represent the time of travel of the ball and let h represent the height.
From the given table, we have;
f(t) = a•(t - h)² + k
f(0) = 120 = a•(0 - h)² + k = a•h² + k
120 = a•h² + k
f(1) = 144 = a•(1 - h)² + k = a•(h² - 2•h + 1) + k
f(1) = a•(h² - 2•h + 1) + k
f(1) - f(0) = 144 - 120 = 24 = -((2•h - 1)•a
24 = -((2•h - 1)•a
f(2) = 120 = a•(2 - h)² + k
f(2) - f(1) = -24 = -((2•h - 3)•a
(f(1) - f(0)) - (f(2) - f(1)) = 48 = -2•a
Therefore;
a = -24
24 = -((2•h - 1)•a
24 = -((2•h - 1)×(-24)
-1 = -((2•h - 1)
2•h - 1 = 1
h = 2/2 = 1
h = 1
120 = a•(2 - h)² + k
120 = (-24)•(2 - 1)² + k
k = 120 + 24 = 144
k = 144Which gives;
The vertex form is y = -24•(x-1)² + 144
From the vertex form, we have;
y = -24•(x-1)² + 144 = -24•(x²-2•t+1) + 144
y = -24•(x²-2•tlx+1)+ 144 = -24•x²+48•x - 24 + 144
y = -24•x²+48•x + 120
y = -24•x² + 48•x - 24 + 144 = -24•x²+ 48•x + 120
y = -24•x² + 48•x + 120
The height of the ball after 1.5 seconds is
y = -24×1.5² + 48×1.5 + 120 = 138
The height of the ball at t = 1.5 seconds is 138 feetLearn more about quadratic equations here:
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Related Questions
write an expression to show the total number of songs on Iris's playlist after w weeks
Answers
120 + 4w is the expression to show the total number of songs on Iris's playlist after w weeks.
She total ahs 120 songs already
She downloads or adds 4 songs every week
An expression to show the total number of songs on Iris's playlist after w weeks is:
120 + 4w
What is an mathematical expression?An expression or mathematical expression is a limited combination of symbols that is well-formed according to context-dependent norms. To help identify the sequence of operations and other features of logical syntax, mathematical symbols can denote numbers (constants), variables, operations, functions, brackets, punctuation, and grouping.
Many authors differentiate between an expression and a formula, with the former referring to a mathematical item and the latter referring to a statement about mathematical objects.
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A student does an experiment in a lab on the boiling point of water. In the 3 trials, the student gets the temperatures of 99.2, 99.5, 100.2 degrees C. Are these measurements:
Question 2 options:
Accuracy
Neither precision nor accuracy
Both precision and accuracy
Precision
Answers
The measurements are precise. Therefore, the correct option is D.
What is precision?It should be noted that precision simply means how close a test is when it's repeated.
On the other hand, it should be noted that accuracy simply means how close the results are to the standard value.
Therefore, when the student does an experiment in a lab on the boiling point of water. In the 3 trials, the student gets the temperatures of 99.2, 99.5, 100.2 degrees, they're precise.
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If f(x) = 3x2 – 2x + 4 and g(x) = 5x2 + 6x – 8, find (f +g)(x).
Answers
Answer:
[tex](f+g)(x)=8x^{2} +4x-4[/tex]
Step-by-step explanation:
[tex](f+g)(x)=3x^{2} +5x^{2} -2x+6x+4-8=8x^{2} +4x-4[/tex]
Hope this helps
Decide whether the table shows a proportional relationship between x and y.
x y
17 2 5/6
5/6 5/36
6 1/6
19 3 1/6
Answers
The table shows a proportional relationship between x and y.
In this question, we have been given a table which contains values of x and y.
We need to decide whether the table shows a proportional relationship between x and y.
x y
17 2 5/6
5/6 5/36
6 1/6
19 3 1/6
First we convert the improper fraction in the y-column to proper fraction.
2 5/6 = 17/6
and 3 1/6 = 19/6
so, given table would be,
x y
17 17/6
5/6 5/36
6 1/6
19 19/6
Consider the ratio x/y of each row:
x y x/y
17 17/6 1/6
5/6 5/36 1/6
6 1/6 1/6
19 19/6 1/6
As the ratio x/y is constant, x and y are directly proportional.
Therefore, the table shows a proportional relationship between x and y.
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Determine the value of cscθ given that the terminal side of angle θ intersects the unit circle in the first quadrant at (7/17,y).
Answers
The value of cscθ is 1/y
In this question, we have been given that the terminal side of angle θ intersects the unit circle in the first quadrant at (7/17, y).
We know that the point on the unit circle is of the form (cosθ, sinθ)
Comparing (cosθ, sinθ) with point (7/17, y) we get,
cosθ = 7/17, and sinθ = y
also, we know that cscθ = 1/sinθ
So, cscθ = 1/y
Therefore, the value of cscθ is 1/y
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thank you so much for the help!!
Answers
The independent variable in these equations based on how they are written is x, since y is a function of x here so y depends on the value of x, while x can be changed freely.
So, for each of these questions, plug in the given value of the independent variable for x.
Independent variable equal to 10: 0.1*10 + 5 = 6
Independent variable equal to 50: 0.1*50 + 5 = 10
Independent variable equal to 120: 0.1*120 + 5 = 17
Help :)
Evaluate the following expression
|−3d−6|+|−5−d2| for d=−3
Answers
|-3(-3)-6|+|-5-(-3)^2|
All we did was input -3 for d in the original equation because they are equal.
Step 2.) We now need to follow PEMDAS (orders of operations) to evaluate the expression. In PEMDAS, parentheses are 1st, exponents are 2nd, multiplication and division are 3rd and are worked left to right (whichever operation comes first), and addition and subtraction are 4th and are worked left to right. *REMEMBER: Multiplication and division are not separate steps; they are step 3 and done at the same time, so you work left to right. The same applies for addition and subtraction, except they are step 4, so they come after multiplication and division. But, addition and subtraction are also the same step, not desperate steps.
So we look at the expression:
|-3(-3)-6|+|-5-(-3)^2|
We can view the absolute value symbols as a form of parentheses, so we must simply what’s in them first.
To the left, we see multiplication and subtraction, but we must multiply first before we subtract:
-3(-3) = 9
|(9)-6|+|-5-(-3)^2|
9-6=3
|3|+|-5-(-3)^2|
Now, we can look at the right expression. We see exponents, so we do that first:
-(-3)^2= -(-3 • -3) = -(9) = -9
|3|+|-5-9|
-5-9= -14
|3|+|-14|
Step 3.) Absolute value is the distance from 0, and distances are never negative, so whenever there is a negative number in absolute value symbols, it ALWAYS equals that number in positive form.
|3|+|-14|
3+14=17.
-14 is not -14 from 0, but it is 14 units from 0. 3 is 3 units from 0. Then, we just added them.
The value of the expression |−3d − 6| + |−5 − d²| when d = -3 is 17.
Given expression: |-3d - 6| + |-5 - d²|, and d = -3
Substitute the value of d: |-3(-3) - 6| + |-5 - (-3)²|
Calculate the values inside the absolute value signs:
|-(-9) - 6| + |-5 - 9|
Simplify the inside calculations:
|9 - 6| + |-5 - 9|
Continue simplifying:
|3| + |-14|
Calculate the absolute values:
3 + 14
Add the values together:
3 + 14 = 17
So, the value of the expression |−3d − 6| + |−5 − d²| when d = -3 is 17.
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Let f (x) = 3x2 − 2x + 4. Evaluate f (a + h) and simplify your answer as much as possible.
Answers
The expression f(x) = 3 · x² - 2 · x + 4 evaluated at x = a + h is equal to the expression f(x) = 3 · a² + 6 · a · h + 3 · h² - 2 · a - 2 · h + 4.
How to evaluate and simplify a quadratic equation
In this question we find a quadratic equation, which has to be evaluated at x = a + h and simplified afterwards. Then, the complete procedure is shown below:
f(x) = 3 · (a + h)² - 2 · (a + h) + 4
f(x) = 3 · (a² + 2 · a · h + h²) - 2 · a - 2 · h + 4
f(x) = 3 · a² + 6 · a · h + 3 · h² - 2 · a - 2 · h + 4
The expression f(x) = 3 · x² - 2 · x + 4 evaluated at x = a + h is equal to the expression f(x) = 3 · a² + 6 · a · h + 3 · h² - 2 · a - 2 · h + 4.
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nate works at a grocery store. he has 7 1/2 pounds of rasins. heis splitting them into 1/8 pound packages. how many packages can he make
Answers
Answer:
Nate can make 60 packages.
Step-by-step explanation:
7 1/2 is equivalent to 7 4/8, or 60/8
Divide 60/8 by 1/8 and you get 60.
HELP PLEASE DUE TODAY
Answers
12) Z ∪ N = {Set of Integers}
13) H ∪ Q = R which is a set of real numbers
How to classify numbers?
We are told that;
R = U represents the set of real numbers
N is the set of natural numbers
W is the set of whole numbers
Z is the set of integers
Q is the set of rational numbers
H is the set of irrational numbers
12) We want to find Z ∪ N. This is a set union of the set of integers and the set of natural numbers.
A rational number is a number that is expressed as the ratio of two integers, where the denominator should not be equal to zero. Thus, an integer is also a rational number and all natural numbers are positive integers and as such;
Z ∪ N = {Set of Integers}
13) We want to find H ∪ Q. This is a set union of the irrational numbers and the set of rational numbers. Now, we know that all real numbers are classified as either rational or irrational numbers
Thus; H ∪ Q = R which is a set of real numbers
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Solve.
⎧⎩⎨⎪⎪2x−y+2z=−6−3y+z=−22x−3z=4
Enter your answer, in the form (x,y,z), in the boxes in simplest terms.
Answers
The solution is (x, y, z) = (-1, 0, -2)
Given equations are:
2x−y+2z=−6 ---------------(1)
−3y+z=−2 ------------------(2)
2x−3z=4 -------------------(3)
From (2), z = -2+3y
Substitute this into (1) and (3)
(1)⇒ 2x-y+2(-2+3y) = -6
⇒ 2x+5y-4=-6
⇒2x+5y = -2
and
(3) ⇒ 2x-3(-2+3y)=4
⇒ 2x-9y+6 = 4
⇒ 2x-9y=-2
Now solve 2x+5y = -2 and 2x-9y=-2
Subtracting the equations above,
14y = 0
⇒y=0
Then from 2x-9y=-2, x = -1
From (2),z = -2+3y
⇒ z = -2
So the solution is (x, y, z) = (-1, 0, -2)
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19 more than four times a number is equal to the difference between -86 and three times the number find the number
Answers
Answer:
the number is -15
Step-by-step explanation:
if you turn the word problem into an equation it would be
4x+19=-86-3x
with x being the unknown number
the next step is to move the -3x to the other side by adding it to the 4x
your equation should now be 7x+19=-86
next you should move the 19 to the other side by subtracting it from the -86
this leaves you with the equation
7x= -105
lastly you must divide the -105 by seven which leaves you with the answer x= -15
Find the average rate of change of the function f(x) = x² + 4x from x₁ = 3 to x₂ = 5.
Answers
The average rate of change of the given function is 12.
The average rate of change of function f on interval [a,b] is:
f(b) -f(a)/b-a
we have interval [x₁,x₂]
[x₁,x₂] = [3,5]
f(3) = x²₊4x
f(3) = 3²+4(3)
f(3) = 21
f(5) = x²₊4x
f(5) = 5²+4(5)
f(5) = 45
f(x₂) -f(x₁)/x₂-x₁
⇒ 45-21/5-3
= 24/2
= 12
The average rate of change of function f(x) = x²+4x on interval [3,5]
is 12.
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Simplify the expression
Answers
Answer:
-8
Step-by-step explanation:
2x/7 =
2(12)/-3 =
24/-3 =
-8
Answer:
-8
Explanation:
Given expression:
[tex]\rightarrow \sf \dfrac{2x}{y}[/tex]
when x = 12, y = -3
Substitute values inside expression:
[tex]\rightarrow \sf \dfrac{2(12)}{-3}[/tex]
multiply
[tex]\rightarrow \sf \dfrac{24}{-3}[/tex]
simplify
[tex]\rightarrow \sf -8[/tex]
A t-shirt requires 1 3/8 yards of material. How many t-shirts can be made from 41 1/4 yards of material?
Answers
Applying the knowledge of fractions, the number of t-shirts that can be made is: 30 t-shirts.
How to Divide Fractions?In the problem given, we have the following information:
Material needed for one t-shirt = 1 3/8 yards
We want to find how many 1 3/4 we would find in 41 1/4.
Applying the knowledge of fraction, we are to divide 41 1/4 by 1 3/8. Convert both mixed fractions to improper fractions then divide:
41 1/4 ÷ 1 3/8
165/4 ÷ 11/8
165/4 × 8/11
165/4 × 8/11
15/1 × 2/1
= (15 × 2)/(1 × 1)
= 30/1
= 30.
Therefore, applying the knowledge of fractions, the number of t-shirts that can be made is: 30 t-shirts.
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The temperature at
7:00 P.M is 18°F. At
7:00 A.M. the next
day, the temperature
is -12°F. What integer
represents the change
in temperature?
Answers
Answer: -30 degrees fahrenheit
Step-by-step explanation: 18 + (-12) = -30
the estimate closest to the length of a pen: 30cm, 160mm, or 16 mm.
Answers
Answer:
160 mm.
Step-by-step explanation:
the average pen is 149mm. the average pen is 14.9cm. 160mm is closest.
It would have to be the 160mm.
This is because store-bought pens average 130 and 140mm/ 13 – 14 cm. This is closely followed by pens in the 140 – 150mm range.
Hope this helps!
Have a great day and God bless! :)
A total of 200 and a difference of 72
Answers
According to the solving the total and the difference of the numbers:
total = 136 + 64
difference = 64
Difference in Math Definition?Mathematical difference is the outcome of one of the key operations, which is the subtraction of two numbers. It reveals the margin of difference between two numbers.
How do we find the difference?Subtract the largest number from the lowest number to determine the difference between two integers. The difference between these two numbers is the product of this sum. As a result, there are 55 between the numbers 45 and 100.
According to the given data:Let the numbers be x and y
Given,
x+y = 200_____(1)
x-y = 72_____(2)
Add above 2 eq.
2x= 272
x= 136
Substitute the value of x in eq 1,we get
136+y = 200
y = 64
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The height above ground of a cannon is a function of the time since it was shot.
Question: When time equals 0, why is the height of the cannon ball not equal to 0? Describe the domain of this function. Describe the range.
Answers
Given is the quadratic function by its graph..
At the start point, when time is zero, the height is not zero because the cannon was shot above the ground level.
The domain is the time from the point the cannon was shot and to the point the ball lands.
The range is the height from zero to the maximum height the ball reaches.
Find the nth term, the fifth term, and the 100th term, of the arithmetic sequence determined by a = 2 and d = 3
Answers
Answer: an=3n-1 a₅=14 a₁₀₀=299
Step-by-step explanation:
a=2 d=3
[tex]\boxed {a_n=a_1+d(n-1)}\\\\a_n=2+3(n-1)\\\\a_n=2+3n-3\\\\a_n=3n-1\\\\a_{100}=3(100)-1\\\\a_{100}=300-1\\\\a_{100}=299\\\\a_5=3(5)-1\\\\a_5=15-1\\\\a_5=14[/tex]
4x + 3 = 18 - x help please
Answers
Answer:
the answer is x=3
Step-by-step explanation:
Answer:
Please mark my answer as the brainliest, it would mean a lot to me
x = 5
Step-by-step explanation:
4x + 3 = 18 - x
3x + 3 = 18
3x = 15
x = 5
Name a point non-coplanar to plane K
Answers
W is the point which is non coplanar to plane k .
WHAT IS A COPLANAR/NON-COPLANAR POINT ?A group of points that are in the same plane are said to be coplanar. A coplanar line connects any two or three points. It's possible that four or more points are coplanar.
The coplanar points A, B, C, and D are displayed on the left side of the above figure. Additionally, there are other sets of coplanar points in the box to the right. For instance, the left side of the box's left side is the plane that contains the coplanar points P, Q, X, and W. There are four coplanar points on each of the box's six faces, however they are not the only coplanar point groups. Points Q, X, S, and Z, for instance, are coplanar despite the fact that the plane containing them isn't depicted.
Non-coplanar points are a collection of points that are not all located on the same plane.
Points P, Q, X, and Y in the previous figure are not coplanar. Q, X, and Y are located on the box's top, and P, Q, and X are located on the box's left side, however no flat surface has all four points.
CALCULATIONsince from the figure we can find out that except two points W , Y all the points are on the plane K .
so according to question and given figure we conclude that one of the point which in non coplanar to K is W.
points highlighted in the figure is non coplanar to point k .
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find inequality : JoJo can eat no more than 25 carbs per meal. Which inequality describes JoJo's situation?
Answers
Answer:
Jojo is on a low carb diet
Write
4/11
as a decimal.
O 0.36
0.36
0.036
0.36
Answers
Answer:
0.36
Step-by-step explanation:
XZ is the perpendicular bisector of segment WY. Solve for m. Enter a NUMBER only.
Answers
2(14m-8)=180
24m-16=180
24m=196
m= 8 and 1/6
The annual attendance at the amusement park is initially 2 million people and is increasing at 3% per year. The park’s annual food supply is initially adequate for 4 million people and is increasing at a constant rate adequate for an additional 0.2 million people per year.
a. Write the equation that represents the food supply. Write the equation represents the park attendance.
The equation that represents food supply is
b. Based on these assumptions, in approximately what year will the amusement park first experience shortages of food?
c. If the park doubled its initial food supply and maintained the rate of increase of 0.2 million people per year, would shortages still occur? In approximately which year?
d. If the park doubled the rate at which its food supply increases, in addition to doubling its initial food supply, would shortages still occur? After how many years would the food supply run out?
Please show work. I will mark brainliest.
Answers
Answer:
[tex]\textsf{a)} \quad f(t) = 4+0.2t \:\: \textsf{ and }\:\:A(t)=2(1.03)^t[/tex]
b) 77 years
c) 86 years
d) 110 years
Step-by-step explanation:
Part (a)Given:
Initial food supply adequacy = 4 million peopleConstant annual growth rate = 0.2 million peopleAs the food supply grows at a constant rate of being adequate for an additional 0.2 million people per year, it can be expressed as a linear function:
[tex]f(t) = 4+0.2t[/tex]
where:
f(t) = annual food supply (in millions of people).t = time (in years).Given:
Initial attendance = 2 million peopleAnnual growth rate = 3%As the annual attendance increases by 3% per year, it can be expressed as an exponential function:
[tex]A(t)=2(1.03)^t[/tex]
where:
A(t) = annual attendance (in millions of people).t = time (in years).Part (b)Graph the two functions (see attached) and locate the value of t for which A(t) > f(t) for the first time.
From inspection of the graph, the two functions intersect at t ≈ 77. So after approximately 77 years the food supply will not be enough for the number of people attending the amusement park. Therefore, after approximately 77 years, the park will first experience shortages of food.
Part (c)If the park doubles its initial food supply and maintains the rate of increase of 0.2 million people per year, the new equation would be:
[tex]f(t) = 8+0.2t[/tex]
Again, graph the new function against A(t) and find the point where the two functions intersect. A(t) = f(t) at approximately t = 86 so the park will first experience food shortages after 86 years. So doubling the initial food supply delays the eventual food shortage by only c. 9 years.
Part (d)If the park doubled the rate at which its food supply increases in addition to doubling its initial food supply, the new equation would be:
[tex]f(t) = 8+0.4t[/tex]
Again, graph the new function against A(t) and find the point where the two functions intersect. A(t) = f(t) at approximately t = 110 so the park will first experience food shortages after 110 years. So doubling the initial food supply and doubling the rate delays the eventual food shortage by only c. 33 years compared to the initial parameters. Shortages would still occur, but it would be later in approximately 110 years' time.
Classify the system and identify the number of solutions.
3x + 5y + 4z = −11
2x − 4y − z = −11
4x + 3y − 2z = 11
Answers
Answer:
Hello,
Step-by-step explanation:
Only one solution: x=-2, y=3,z=-5
Answer:
consistent, independent; one
Step-by-step explanation:
The solution is (−2, 3, −5). Because the system has one solution, it is consistent and independent.
A point A (x, y) is translated 7 units to the left and 2 units up. What is the mapping to the new point A’?
(x+2, y+7)
(x-7, y+2)
(x+2, y-7)
(x+7, y+2)
Answers
Reason:
7 units to the left means x becomes x-7
2 units up means y becomes y+2
Therefore, the old preimage (x,y) translates or shifts to the new image (x-7, y+2)
Example:
[tex](\text{x},\text{y}) = (3,5)\\\\(\text{x},\text{y})\to(\text{x}-7,\text{y}+2)\\\\(3,5)\to(3-7,5+2)\\\\(3,5)\to(-4,7)\\\\[/tex]
The preimage (3,5) moves to (-4,7) after shifting 7 units left and 2 units up.
Please help I will give anyone brainliest
Answers
Answer:
1672.50 = 37.75x + 1068.50
x = 16
There were 16 players brought to the tournament.
Step-by-step explanation:
y = mx + b
y= the total cost
m = cost of each meal
x = the number of players
b = cost of the bus
Plug in what you know and solve for x
1672.50 = 37.75x + 1068.50 Subtract 1068.50 from both sides.
604 = 37.75x Divide both sides by 37.75
16 = x
Equation: 1068.50 + 37.75x =1,672.50
Answer: X= 16
If 1,672.50 is our total it will go behind the equal sign. 37.75x and 1068.50 must be added together to help us receive our total.
Our written equation should look like this
1068.50 + 37.75x =1,672.50
X is the number of players on the team.To find out we must first subtract the amount of money spent on the bus, from the total amount spent.
1,672.50-1068.50 is 604. This means our equation now looks like this
37.75x=604. The next and final step is to divide 37.75 into 604.
604/ 37.75 is 16. Which means that there are 16 players on the team.
I hope this helps & Good luck.
Which lists all the factors of 78?
Answers
Answer:
1, 2, 3, 6, 13, 26, 39, and 78
Step-by-step explanation:
:)