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3 years ago

(0,-4),(1,0),(2,2) find a quadratic function in standard form for each set of points.

1 answer:

4 0

We are given the points
(0,-4),(1,0),(2,2)
The standard form a quadratic function (in terms of x) is
y = Ax2 + Bx + C
Subsitute the points
-4 = 0 + 0 + C
C = -4

0 = A + B - 4

2 = 4A + 2B - 4

Solve for A and B
A = -1
B = 5

The function is
y = -x2 + 5x - 4

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Molly is painting a model house and needs to know how much paint she will need. She knows the surface area of the prism is 216 s

Stells [14]

Answer:

Part 1) The surface that is shared by the two solids is the top of the cube that is the same that the square base of the pyramid

Part 2) The dimensions of this surface are 6 in x 6 in

Part 3) Molly needs to paint 228 square inches

Step-by-step explanation:

The picture of the question in the attached figure

Part 1) Which surface is shared by the two solids?

we know that

The surface that is shared by the two solids is the top of the cube that is the same that the square base of the pyramid

Part 2) What are the dimensions of this surface?

The surface is a square with side length 6 inches

The dimensions of this surface are 6 in x 6 in

Part 3) what is the area molly needs to paint?

we know that

The area that Molly needs to paint is equal to the surface area of the cube plus the surface area of the pyramid minus two times the area of the surface that is shared by the two solids

$SA=216+84-2(6^2)$

$SA=228\ in^2$

therefore

Molly needs to paint 228 square inches

8 0

3 years ago

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Serena drove 40km on 3L of gasoline . which proportion would help determine how far she can travel on a full 50 L tank of gasoli

Bogdan [553]

40 km/3 L = x km/ 50 L
40 km * 50 L = x km *3 L
2000 = 3 * x
X = 666 km

3 0

3 years ago

I can’t fail please help

scoray [572]

Hey there!

The answer is 6:54

The time on the clock shows 6:20, because the hour hand is after the 6, and the minute hand is on the 4 (which we multiply by 5 to get the minutes).

If it takes her 8 minutes to walk to the bus, 10 to pack lunch, and 16 to get dressed, that's a total of 8 + 10 + 16 minutes, or 34 minutes.

So, we add that to the minutes, so 20 + 34 = 54, therefore the time is 6:54 when she arrives.

Have a terrificly amazing day! :)

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frosja888 [35]

B. D=0.25n + 25
D=total n=number of hours 0.25=price per hour 25=the one time fee

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What is the value of x in the equation below? -3-(-8)-(-2) = x O-13 O9 O 3 O 7

posledela

Answer:

Step-by-step explanation:

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