Answer:
a. y + 7
b. y - 4
c. y times 3 or 3y
d. 3y + 30
e. 6y + 8
Step-by-step explanation:
Algebraic expressions don't need to be a complete equation.
are fractions with the same denominator?
Answer:
To solve fractions, you MUST HAVE THE SAME DENOMINATORS WHEN DEALING WITH ADDITION AND SUBTRACTION.
Step-by-step explanation:
For example, 2/3 + 3/6
The denominators in this case have a common denominator which is 6.
All you have to do is multiply the 2/3 by 2 in the numerator and the denominator. Once you do, you'll get 4/6 which you could then add to 3/6 to get 7/6 which would equal 1 1/6 or 7/6 either is fine.
Hope this helps! :)
Answer:
To solve fractions, you MUST HAVE THE SAME DENOMINATORS WHEN DEALING WITH ADDITION AND SUBTRACTION.
Step-by-step explanation:
21 students went on an exchange program to hong kong. There were 11 more women than men. How many woman are there?
Answer:
11
Step-by-step explanation:
11 + 10 = 21
I"LL MARK YOU BRANLIEST IF YOU ANSWER CORRECT! Ayana's favorite brownie recipe calls for 1/2 of a cup of flour for every 1/3 of a cup of cocoa powder. For a bake sale, she plans to make a larger batch with 1 cup of cocoa powder. How much flour should she use?
Answer:
either a full cup or 1 1/2
The third term of an A.P is 4m - 2n. If the ninth term of the progression is 2m - 8n. Find the common difference in terms of m and n
Let [tex]a_n[/tex] denote the n-th term in the progression. So
[tex]a_n=a_{n-1}+d[/tex]
for some constant difference between terms d.
Solve for [tex]a_n[/tex] explicitly:
[tex]a_4=a_3+d[/tex]
[tex]a_5=a_4+d=a_3+2d[/tex]
[tex]a_6=a_5+d=a_3+3d[/tex]
and so on, up to
[tex]a_n=a_3+(n-3)d[/tex]
We're told that the third term is [tex]a_3=4m-2n[/tex], and the ninth term is [tex]a_9=2m-8n[/tex], and according to the recursive rule above, we have
[tex]a_9=a_3+6d[/tex]
Solve for d :
[tex]2m-8n=(4m-2n)+6d[/tex]
[tex]-2m-6n=6d[/tex]
[tex]d=-\dfrac{2m+6n}6=\boxed{-\dfrac{m+3n}3}[/tex]
I'm confused. Hopefully, you can help me.
Answer:
C
Step-by-step explanation:
a straight line is 180, 180-40=140
What is | -8|
—16
-8
8
16
Answer:
8
Step-by-step explanation:
scince it has the lines that mean that it will always be positive.
Answer:
8
Step-by-step explanation:
Have a nice day!
Which equation represents a line that has a slope of One-third and passes through point (–2, 1)?
Answer:
y=1/3x+5/3
Step-by-step explanation:
y=1/3x+b
1=1/3(-2)+b (plug in ya points)
1=-2/3+b
5/3=b
y=1/3x+5/3
Answer:
the answer is y=1/3x+5/3
Step-by-step explanation:
hope this helps
did it on edge
3)
Blair expects an increase of 3% in her current annual
salary of $42,000. What would her new annual salary
be?
Answer:
$43,260
Step-by-step explanation:
You have the 3% annual income, which you can convert to a decimal. This gives:
42000 * 1.03
42000 represents Blair's initial income, and 0.03 represents the 3% increase.
I chose 1.03 because I don't have to subtract 97% and add it to 42000.
HELP NEEDED ASAP MATHS PLEASE!!!
plz help I will mark brainlest!
Answer:
-1.71 the answer is d
Step-by-step explanation:
.........
Prove that if r is any rational number, then 3r2 − 2r + 4 is rational. The following properties may be used in your proof. Property 1: Every integer is a rational number. Property 2: The sum of any two rational numbers is rational. Property 3: The product of any two rational numbers is rational. Note: Property 1 is Theorem 4.3.1, Property 2 is Theorem 4.3.2, and Property 3 is Exercise 15 in Section 4.3. Using these properties, choose explanations for each step in the given proof.
Given:
Expression is
[tex]3r^2-2r+4[/tex]
To prove:
If r is any rational number, then [tex]3r^2-2r+4[/tex] is rational.
Step-by-step explanation:
Property 1: Every integer is a rational number. It is Theorem 4.3.1.
Property 2: The sum of any two rational numbers is rational. It is Theorem 4.3.2.
Property 3: The product of any two rational numbers is rational. It is Exercise 15 in Section 4.3.
Let r be any rational number.
We have,
[tex]3r^2-2r+4[/tex]
It can be written as
[tex]3(r\times r)-2r+4[/tex]
Now,
3, -2 and 4 are rational numbers by property 1.
[tex]r^2=r\times r[/tex] is rational by Property 3.
[tex]3r^2\text{ and }-2r[/tex] are rational by Property 3.
[tex]3r^2+(-2r)+4[/tex] is rational by property 2.
So, [tex]3r^2-2r+4[/tex] is rational.
Hence proved.
We want to prove that if r is rational, then:
[tex]3*r^2 - 2r + 4[/tex] Is also rational.
The proof is below:
Remember that a rational number is any number that can be written as a quotient of two integer numbers.
Then we have:
[tex]r = \frac{a}{b}[/tex]
Where a and b are integers.
If we replace that in our equation, we get:
[tex]3*(\frac{a}{b}) ^2 - 2*(\frac{a}{b}) + 4\\\\\frac{3a^2}{b^2} - \frac{2a}{b} + \frac{4}{1}[/tex]
Note that if a is an integer, then 3*a^2 is also an integer.
If b is an integer, then b^2 is also an integer.
Now we can perform the sum of these fractions to get:
[tex]\frac{3a^2}{b^2} - \frac{2a}{b} + \frac{4}{1}\\\\\frac{3a^2 - 2ab + 4b^2}{b^2}[/tex]
And because integers are closed under the addition, then the numerator of that fraction is also an integer, then we have that the given expression can be written as a quotient of two integers, thus, it is a rational number.
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A bacteria population increases exponentially at a rate of r% each day. After
32 days, the population has increased by 309%. Find the value of r.
Answer:
r=4.5% daily
Step-by-step explanation:
Exponential Growth
The natural growth of some magnitudes can be modeled by the equation:
[tex]P=P_o(1+r)^t[/tex]
Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.
We know after t=32 days, the population has increased by 309%. Being the original population P the 100%, then the population reached 309+100= 409%.
Substitute the given values into the model function:
[tex]409\%P_o=100\%P_o(1+r)^{32}[/tex]
Simplifying:
[tex]4.09=(1+r)^{32}[/tex]
We need to solve for r. Taking the 32nd root:
[tex]\sqrt[32]{4.09}=\sqrt[32]{(1+r)^{32}}[/tex]
Simplifying:
[tex]1+r=\sqrt[32]{4.09}=1.045[/tex]
Solving:
[tex]r=1.045-1\Rightarrow r=0.045[/tex]
r=4.5% daily
How do you know if a sum or product will result in a rational or irrational number?
3. Write an exponential function that represents the table and graph. y=0-b*
please help!!
The number of trout in America since 2000 is given by the following formula:
[tex]y=x^2+3x+2[/tex]
"x" is the number of years and "y" is the number of trout in the millions.
Based on this formula, estimate the number of trout in the years 2005, 2010, and 2015.
Describe the trend in the number of trout as the years increase.
Answer:
See below
Step-by-step explanation:
Given formula
y = x² + 3x + 2x- is the number of years after 2000,y - is the number of troutYear 2005, finding number of trout
x = (2005 - 2000) = 5y = 5² + 3*5 + 2 = 42 millionsYear 2010, finding number of trout
x = (2010 - 2000) = 10y = 10² + 3*10 + 2 = 132 millionsYear 2015, finding number of trout
x = (2015 - 2000) = 15y = 15² + 3*15 + 2 = 272 millionsNumber of trout is trending up with significant increase over yeas
Answer:
42 million132 million272 millionThe number of trout inceases a lot each 5 years that pass.Step-by-step explanation:
Number of trout in 2005.
Find the number of years apart from 2000 to 2005.
2005 - 2000 = 5
Substitute for x and solve for y.
y = x² + 3x + 2
y = (5)² + 3(5) + 2
y = 25 + 15 + 2
y = 40 + 2
y = 42 million
Number of trout in 2010.
Find the number of years apart from 2000 to 2010.
2010 - 2000 = 10
Substitute for x and solve for y.
y = x² + 3x + 2
y = (10)² + 3(10) + 2
y = 100 + 30 + 2
y = 130 + 2
y = 132 million
Number if trout in 2015.
Find the number of years apart from 2000 to 2015.
2015 - 2000 = 15
Substitute for x and solve for y.
y = x² + 3x + 2
y = (15)² + 3(15) + 2
y = 225 + 45 + 2
y = 270 + 2
y = 272 million
Best of Luck!
Translation is a congruency transformation. True or false
Answer:
True
Step-by-step explanation:
In a translation, the figures face the same direction and are congruent.
What is an equation of a line with slope −2/3 and a y-intercept of −4?
Jamie has a sprinkler than covers a circular area with diameter 16 feet. What is the area of lawn that the
sprinkler covers?
Answer:
64π or 201.0619298297
Step-by-step explanation:
Area of a circle: πr²
To find r, the radius of the circle, take the diameter (16) and halve it to get 8. You can now place 8 into the equation to get π8². Square 8 to get 64. You now now have π64, or 201.0619298297.
I need help on this ASAPPPPPPP
Which expression shows how to convert 60 hours into days?
Answer: so, 60 hours = 60/24 days = 2 days 12 hrs
Step-by-step explanation:
PLZ, HELP WILL GET BRAINLIEST AND A LOT OF POINTS.
What is the exponential function rule for the following points
x f(x)
1 8
2 32
3 128
4 512
Answer:
y=2(4^x)
Step-by-step explanation:
if you notice, all the y-values are multiplied by 4 for each x-value. this means 4 is raised to the power of x. however, when you plug this in, you realize that the value produced is only half the actual y-values, so you multiply this whole thing by 2.
y=2(4^x)
Answer:
f(x) = 2^(2x+1)
Step-by-step explanation:
You can tell that each of the outputs of f(x) are powers of 2, so all you have to do is figure out the pattern of the exponents.
2^3 = 8
2^5 = 32
2^7 = 128
2^9 = 512
the relationship between the sequence
3,5,7,9
when you start on 1 is
2x+1
2(1)+1 = 3
2(2)+1 = 5
etc.
Which of the following steps would you use to
evaluate (a + b)??
Answer:
(a+b)(a+b)
Step-by-step explanation:
Geometry The sides of a yield sign all have the same
length (see figure). The perimeter of a roadway yield
sign is 225 centimeters. Find the length of each side.
YIELD
Figure for 51
Figure for 52
Answer:
75 cm
Step-by-step explanation:
Given:
Perimeter of the triangular yield sign = 225 cm
Side lengths = x, x and x
Required:
Length of each side
SOLUTION:
Perimeter of the triangular yield sign = sum of all sides of the triangular yield sign
225 cm = x + x + x
Solve for x
225 = 3x
Divide both sides by 3
225/3 = 3x/3
75 = x
x = 75
The length big each side is 75 cm
Drag the divisor fraction to the dividend bar to see how many
parts of the divisor are in the dividend
Use fraction bars and the rules of dividing signed
numbers to divide
15
Dividend
15 3
5 5
o
18
cila
o
Divisor
o
12
O -5
Answer:
Is B
Step-by-step explanation:
The dividend is 2 and the divisor is 2/5
What is Division?A division is a process of splitting a specific amount into equal parts.
The given fraction is 2 ÷ 2/5
The number which is getting divided here is called the dividend.
The number which divides a given number is the divisor.
In the given division the dividend is 2
The divisor is 2/5
Hence, the dividend is 2 and the divisor is 2/5
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2х - Зу= 2
х= бу - 5
X=
Y=
Answer:
2x-3y=2
x=6y-5
2(6y-5)-3y=2
use the distributive property.
2*6y=12y
2*-5=-10
12y-10-3y=2
combine like terms
12y-3y=9y
9y-10=2
add 10 to both sides.
9y-10+10=9y
2+10=12
9y=12
divide both sides by 9
9y/9=y
y=about 1.33
plug in the value of y in the expression equal to the value of x.
x=6(1.33)-5
solve
6*1.33=7.98
x=7.98-5
7.98-5=2.98
Step-by-step explanation:
x=2.98
y=1.33
Need help with this one please show it step by step.
Thank you!
Answer:
which class you are plz say dude
Given m||n, find the value of x.
t
>m
(3x+14)
(7x-4)
Answer:
(3x+14°) + (7x-4)° = 180°
=> 10x + 10 = 180
=> 10x = 180 – 10
=> x = 170/10
=> x = 17
The value of x is 17
For adults who sailed on the Titanic on its fateful voyage, the odds ratio20 between gender (female, male) and survival (yes, no) was 11.4. a. What is wrong with the interpretation, "The probability of survival for females was 11.4 times that for males?" Give the correct interpretation. b. The odds of survival for females equaled 2.9. For each gender, find the proportion who survived. Find the value of RR in the interpretation, "The probability of survival for females was RR times that for males."
Work out 2 1/3 divided by 1/4
Answer:
9.3333333
Step-by-step explanation:
Answer:
[tex] \frac{9}{4} \div \frac{1}{4}
\frac{9}{4} \times \frac{4}{1}
= \frac{34}{4} \\ \\ \\ \\ = 9[/tex]
You are certain to get 2 Kings when selecting 50 cards from a shuffled deck. express the indicated degree of likelihood as a probability value between zero and one inclusive
Answer:
1
Step-by-step explanation:
The probability of this happening would be a 1 when placing a value between zero and one inclusive. One in this case would indicate a 100% probability. This is the case because in the question it is stated that it is "certain" that you will get 2 kings when selecting 50 cards, this means that no matter what it will happen every time 50 cards are drawn, thus making the probability 100%. If the question were phrased differently such as "what is the probability of getting 2 kings from 50 cards drawn?" then the probability would be 0.04 or 4% which is 2/50.
Using probability concepts, it is found that the likelihood is of 1.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
A few observations regarding probabilities are important.
It assumes values between 0% and 100% as percentages and between 0 and 1 as decimals.If an event is certain not to happen, the probability is of 0% = 0.If an event is certain to happen, the probability is of 100% = 1.In this problem, you are certain to get 2 Kings when selecting 50 cards from a shuffled deck, hence the likelihood is of 1.
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