Answer:
Below in bold.
Step-by-step explanation:
We find fg(x) by replacing the x in f(x) by g(x), so:
fg(x) = (4x - 2a)^2 + 4a(4x - 2a) + a^2
fg(3) = 89 so:
(4(3) - 2a)^2 + 4a(4(3) - 2a) + a^2 = 69
(12 - 2a)^2 + 48a - 8a^2 + a^2 - 69 = 0
144 - 48a + 4a^2 + 48a - 8a^2 + a^2 - 69 = 0
-3a^2 + 75 = 0
-3a^2 = -75
a^2 = 25
a = 5.
Now g(x) = 4x - 2(5) = 4x - 10.
Finding g-1(x);
4x = g(x) + 10
x = (g(x) + 10)/4
So g-1(x) = (x + 10)/4
When g-1(x)= x
x = (x +10)/4
4x = x + 10
3x = 10
x = 10/3.
An auditorium has 25 rows of seats and a total of 500 chairs.
How Many chairs in each row?
A ball was projected into the air with an initial upward velocity of 72 feet per second. The quadratic function graphed below shows the height, h, of the ball t seconds after it was projected into the air.
What is the domain of the function for this situation?
Question 20 options:
0≤t≤4.5
0
0
0≤h≤80
The domain is represented by the set of values of the time, that is, the horizontal axis, and the domain of the given function is represented by t ∈ [0, 4.5].
How to determine the domain of the function of the height of the ball in function
All functions are relations in which there is no value of the domain related to more than one value of the range, functions in explicit form related the variable of the range in terms of the variable of the domain.
Based on the information shown in the graph, the domain is represented by the set of values of the time, that is, the horizontal axis, and the range is represented by the set of values of the height, that is, the vertical axis.
Hence, the domain is represented by the set of values of the time, that is, the horizontal axis, and the domain of the given function is represented by t ∈ [0, 4.5].
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i need help with this
Answer: B) x=5, x=1
Step-by-step explanation:
To start multiply everything in the expression by 2
[tex]0.5x^{2} -3x+2.5\\x^{2} -6x+5[/tex]
Now factor the trinomials for when a=1
So you must find two numbers that add to -6 and multiply to 5
In this case, the numbers are -1 and -5
[tex]x^{2} -6x+5\\(x-1)(x-5)[/tex]
Now set each of the factors equal to 0 and solve for x
[tex]x-1=0\\x-1+1=0+1\\x=1[/tex]
[tex]x-5=0\\x-5+5=0+5\\x=5[/tex]
Simplify this equation is easiest form.
Answer:
no. 4
Step-by-step explanation:
=25x - 125/x^2 - 25
=25(x-5) / x^2 - 5^2
=25(x-5) / (x-5) (x+5) <use of formula a^2 - b^2=(a-b) (a+b)>
=25/x+5 <cut (x-5) on both side>
Gale the birthday clown is blowing up a fun spherical shaped balloon at a constant rate of 100 cubic inches per minute. How fast is the radius increasing when the sphere contains 50 cubic inches of clown breath
Answer:
Step-by-step explanatio the way the question is phrased Is confusing
5 Henry wants to add these numbers. 53 +81 +44 + 72 Explain how he can find the sum by breaking the numbers into tens and ones. What is the sum?
Answer:
50+3+80+1+40+4+70+2
Step-by-step explanation:
Pls thank if correct
Dont get mad if not correct.
Hope this helps <3
WILL GIVE BRAINLIESTTTT, FIVESTARS ANDTHANKS
PLEASEHELP
Answer:
3 is the answer
Step-by-step explanation:
answer up above
molly is 4 years younger than Heidi. In 3 years, Heidi will be twice as old as Molly. How old are they now
Answer:
Molly would be 1 years old.
Step-by-step explanation:
"In three years..."
(m+3) will be Molly's age then.
(h+3) will be Heidi's age then.
(h+3) = 2(m+3) :: given.
.
Subsitute what we know about m, which is it equal h-4.
.
(h+3) = 2(m+3)
(h+3) = 2m + 6
substitute m=h-4
(h+3) = 2(h-4) +6
h +3 = 2(h -4) +6
h +3 = 2h -8 +6
h +3 = 2h -2
h = 2h -8 +3
-h = -5
h = 5
Heidi is 5 years old now.
.
m = h-4
m = 5-4
m = 1
Molly is 1 years old now.
expand and simplify 2(5x+3)-2(2x-3)
Answer:
hopes this helps.
Step-by-step explanation:
Hey there!
2(5x + 3) - 2(2x - 3)
DISTRIBUTE
= 2(5x) + 2(3) - 2(2x) - 2(-3)
= 10x + 6 - 4x - 6
COMBINE the LIKE TERMS
= (10x - 4x) + (6 + 6)
= 10x - 4x + 6 + 6
= 6x + 12
Therefore, your answer is: 6x + 12
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
The table shows us how many sit ups she has done over the past few days-
At this rate how many sit-ups will she do on day 12?
Answer:
177
Step-by-step explanation:
the number of sit-ups is going up in 4s , so if i take the 33 sit ups she does on the 5th day i add 4 to that 12 times , so you just do 33+12 and multiply that by 7 since thats how many days she has until 12.
Here is a pyramid with a base that is a pentagon with all sides the same length
Describe the cross section that will result if the pyramid is sliced:
horizontally (parallel to the base).
vertically through the top vertex (perpendicular to the base)
The shape of the cross section formed from slicing the pyramid is called; a triangle
What is the Pyramid's Cross Section?We are told that it is a pyramid with a base that is a pentagon with all sides the same length.
Now, the Pyramid's ap-ex is usually constructed by isosceles triangles. Thus, when they are sliced from its ap-ex to from the vertex, in the cross section a triangle will be formed, This triangle will be an isosceles triangle.
In conclusion, the shape of the cross section formed from slicing the pyramid is a triangle.
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The binomial (a 5) is a factor of a2 7a 10. what is the other factor? (a 2) (a 5) (a−2) (a−5)
An expression has numbers, variables, and mathematical operations. The other factor of the given binomial is a²+7a+10 except (a+5) is (a+2).
What is an Expression?In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
To find the other factor of the binomial a²+7a+10, we can write it as,
[tex]a^2+7a+10\\\\=a^2+5a+2a+10\\\\=a(a+5)+2(a+5)\\\\=(a+5)(a+2)[/tex]
Thus, the other factor of the given binomial is a²+7a+10 except (a+5) is (a+2).
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Answer:
(a + 2)
Step-by-step explanation:
A firm is considering projects s and l, whose cash flows are shown below. These projects are mutually exclusive, equally risky, and not repeatable. The ceo wants to use the irr criterion, while the cfo favors the npv method. You were hired to advise the firm on the best procedure. If the wrong decision criterion is used, how much potential value would the firm lose?.
If the wrong discion criterion is used, the potential lose in value for the firm is $209.07.
What is the correct decision criterion?
The correct decision criterion is the net present value. Net present value is the present value of after-tax cash flows from an investment less the amount invested. The internal rate of return is the discount rate that equates the after-tax cash flows from an investment to the amount invested
What is the loss in value if the wrong decision criteria is used?The net present vaue and the internal rate of return can be calculated using the financial calcuator.
Project S:
Cash flow in year 0 = $-1025Cash flow each year from year 1 to 4 = $380I = 6%
NPV = 291.74
IRR = 17.86%
Project I:
Cash flow in year 0 = $-2150
Cash flow each year from year 1 to 4 = 765
I = 6%
NPV = 500.81
IRR = 15.78%
If the wrong criteria is used, Project S would be chosen.
Loss in value = 500.81 - 291.74 = $209.07.
Here are the cash flows used:
WACC: 6.00%
Year 0 1 2 3 4
CF S -$1,025 $380 $380 $380 $380
CF I -$2,150 $765 $765 $765 $765
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A car speeds up from 0 to 15 m/s in 5 s. What is the car's acceleration?
A. 0.3 m/s/s
B. 3 m/s/s
C. 10 m/s/s
D. 20 m/s/s
Answer: B 3m/s²
Step-by-step explanation: Acceleration is difference in speed /time = 15-0/5
Write in standard form
(4.6 x 10^6) x (5 x 10^-4)
Simplify the expression 63 + 5(4-2)
Answer:
63 + 10
Step-by-step explanation:
when you do parenthesis and the number is next to another one with no symbol you multiply so 4-2 = 2 2 x 5 = 10 giving you 63 + 10
A container in the shape of a rectangular prism has a height of 2 feet. Its length is four
times its width. The volume of the container is 200 cubic feet. Find the length and width of
the container.
Answer:
length = 20 feet and width = 5 feet
Step-by-step explanation:
Volume is equal to volume = height * width * length. The questions tells us the total volume is 200 cubic feet and that the lenght is equal to length = 4w. Set up the equation 4w * w * 2 = 200 cubic feet. Multiply to get 8w^2 = 200 and solve for w.
Joshua is trying to determine the equation of a quadratic function
whose vertex is (-3,5) and passes through the point (-1,2).
If he writes his final answer in the form (x)= a(x-1)2+k, what will be
the values(numbers) of a, h, and k?
And the last answer choice is
a=-3/4
h=-3
K=5
Please help
[tex]~~~~~~\textit{vertical parabola vertex form} \\\\ y=a(x- h)^2+ k\qquad \begin{cases} \stackrel{vertex}{(h,k)}\\\\ \stackrel{"a"~is~negative}{op ens~\cap}\qquad \stackrel{"a"~is~positive}{op ens~\cup} \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{vertex}{(-3~~,~~5)}\qquad y=a[x-(-3)]^2+5\implies y=a(x+3)^2+5 \\\\\\ \textit{we also know that} \begin{cases} x=-1\\ y=2 \end{cases}\qquad 2=a(-1+3)^2+5\implies -3=a(2)^2 \\\\\\ -3=4a\implies -\cfrac{3}{4}=a~\hfill \boxed{y=-\cfrac{3}{4}(x+3)^2+5}[/tex]
Alex and Bev sat six tests, each with 50 marks.
The table shows their mean percentages after five tests.
Alex
60%
Bev
52%
After all six tests, their mean percentages were equal.
In the sixth test, Alex scored 24 out of 50
Work out Bev's score, out of 50, in the sixth test.
Answer:
44
Step-by-step explanation:
60 × 5 or 300
or
52 × 5 or 260
24
50
× 100 or 0.48 × 100
or 48
348 implies
60 × 5 +
24
50
× 100 – 52 × 5
or
300 + 48 – 260 or 88
5. Find the value of x to the nearest tenth. Volume of the prism
is 576 cm?
Volume: 576 cm3
the volume of the triangular prism will be, the area of the triangular face times its length
[tex]\stackrel{\textit{area of the triangle}}{\left[ \cfrac{1}{2}(\underset{b}{8})(\underset{h}{8}) \right]}~~ ~~\stackrel{length}{(x)}~~ = ~~\stackrel{volume}{576}\implies 32(x)=576 \\\\\\ 32x=576\implies x=\cfrac{576}{32}\implies x=18[/tex]
For 5 points and brainliest to the best correct answer, find the missing measures.
Thank you
Answer:
x = 7y = 97°z = 19Step-by-step explanation:
The markings on the figure show this to be a parallelogram. That means opposite sides are congruent. Because the sides are parallel, "alternate interior" angles are also congruent.
__
Angle y forms a linear pair with the one marked 83°, so is supplementary to it:
y = 180°-83° = 97°
__
The angle marked y is an exterior angle to the triangle containing the angle marked (7x -5)°. As such, it is equal to the sum of the remote interior angles, the one marked (7x -5)° and the unmarked one that is congruent to (3x +32)°.
(7x -5) +(3x +32) = 97 . . . . . angle relations in the left-side triangle
10x +27 = 97 . . . . . . . collect terms
10x = 70 . . . . . . . . subtract 27
x = 7 . . . . . . . . divide by 10
__
The side marked Z is congruent to the opposite parallel side, so ...
z = 19
__
The missing measures are ...
x = 7y = 97°z = 19_____
Additional comment
You can also find the value of y by adding up the interior angles of the right-side triangle. The one not shown there is "alternate interior" to the one marked (7x -5)°, hence has the same measure. This gives ...
(7x -5) +(3x +32) +83 = 180
Subtracting 83° from both sides gives the equation we used above.
Step right up for a brainliest
Tim bought 555 crayons that came in packs of of 15. There were 7 colors of crayons. How many crayons did Tim buy
Answer:
555
Step-by-step explanation:
The packs the colors came in and the colors do not matter. The initial value of crayons is 555.
Find the outer perimeter of this figure. Round
your answer to the nearest hundredth. Use
3.14 to approximate pi.
P = [ ? ] ft.
Answer:
61.90 ft
Step-by-step explanation:
Perimeter: the boundary that surrounds a shape
1) Find the perimeter of the semicircle using this formula: [tex]\frac{1}{2} *2\pi r[/tex], where [tex]r[/tex] is the radius, and π is 3.14 (according to the question).
1.1) We need to find the radius first.
Radius = Diameter ÷ 2
So, 10 ÷ 2 = 5
1.2) Input the values into the semicircle formula.
[tex]\frac{1}{2} *2(3.14)(5)[/tex]
1.3) solve for the perimeter of the semicircle.
[tex]\frac{1}{2} *31.4[/tex]
= 15.7
2) Find the perimeter of the triangle and the rectangle.
= [tex]6 + 12.2 + 14 + 14[/tex]
= 46.2
3) Add them.
= [tex]46.2 + 15.7[/tex]
= 61.9 ft
3) Round the answer (61.9) to the nearest hundredth (according to the question).
= 61.90 ft
As per the total length of the arc of a semicircle, the outer perimeter of this figure is 61.9 feet.
What is the total length of the arc of a semicircle?A semicircle that has a radius of 'r' units, has the total length of it's arc is
= πr units
In the given figure, the semicircle has a diameter = 10 feet.
Therefore, the radius of the semicircle
= 10/2 feet
= 5 feet
Now, the total length of it's arc is
= πr units
= 3.14 × 5 feet
= 15.7 feet
Therefore, the outer perimeter of this figure is
= (12.2 + 6 + 14 + 15.7 + 14) feet
= 61.9 feet
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What is the circumference (rounded to the nearest meter) of a circular swimming pool that has a radius of 10 meters?
A. 120
B. 63
C. 60
D. 31
E. 30
Please help with the answer and explain it to me.
Answer:
63
Step-by-step explanation:
You get the answer by multiplying the radius by 2 to get the diameter and then multiplying the result by pi or 3.14, which gives you 62.83 and then round it up which is 63
HELP ME PLEASE ILL MARK U THE BRAINLEST THING PLEASEE I BEG
Answer:
See below ~
Step-by-step explanation:
a)
The intersection of the points represents where they had travelled the same distance at that timeb)
Leslie passed Gale at approximately 2:00 PMc)
Leslie had travelled about 20 miles when they passed Galed)
Between 1:30 and 3:00, Gale had not moved any distance w.r.t time, meaning she had stopped, presumably to take a break, or to fix something that may have happened to her bikee
Rate of covering distance = 10 miles/1 hourTotal distance = 60 milesTotal time = 60/10 = 6 hoursNoon + 6 hours = 6:00 PMFind the surface area of a rectangular prism (like the rectangular prism below) that is 16 feet by 1.5 feet by 2 feet.
Solve and get 30pts!!
Answer:
Surface area of the rectangular prism=
Step-by-step explanation:
Given Dimensions of the rectangular prism are:
[tex]Length(L)=16yards[/tex]
[tex]Width(w)=2yards[/tex]
[tex]Height(H)=1.5yards[/tex]
Surface Area of a rectangular prism=
[tex]2(L*W+W*H+H*L)[/tex]
[tex]=2(16*2+2*6+6*16)[/tex]
[tex]=2(32+12+96)[/tex]
[tex]=2(140)[/tex]
[tex]=140yards^2[/tex]
The surface area of the rectangular prism is [tex]140yards^2[/tex]
It took a car 3 hours to travel from town a to town b the wheel of a car completes a rotation in one second how many degrees has it turned
The number of degrees that have been turned by the car when it travels from town a to town b will be 1080°.
How to calculate the number of degrees?From the information given, it was stated that it took a car 3 hours to travel from town a to town b and the wheel of a car completes a rotation.
In this case, a rotation is 360°, since there are 3 rotations, the degrees will be:
= 360 × 3
= 1080°
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A large aircraft is flying on a bearing of 310° (50° west of north) with an airspeed of 700 mph. It is being affected by a 100 mph wind
blowing towards the west, as shown in the diagram below.
The distance, R, as indicated in the diagram, that the plane has travelled after 1 hour is, to the nearest mile,
Answer:
779
Step-by-step explanation:
Aiming to get the value of formula
Given that
50° + 80² = 140°.
:: Cos140² = 100 + 700²³ - R²
kaw of ousines axivox. T
·· R² = 607246
R≈ 780 miles
• The result is T80 miles
4.
1 in
14 in
2.5 in
Volume of each prisms
Answer:
ength l = 1 in
width w = 14 in
height h = 2.5 in
diagonal d = 14.3 in
total surface area Stot = 103 in2
lateral surface area Slat = 75 in2
top surface area Stop = 14 in2
bottom surface area Sbot = 14 in2
volume V = 35 in3