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3 years ago

10

Complete the area model to identify the quadratic expression it represents. A) 6x2 − 8x − 5 B) 6x2 − 8x + 6 C) 8x2 − 16x − 5 D)

8x2 − 16x + 6

1 answer:

Ivahew [28]3 years ago

6 0

The answer is D. I took the test and B was wrong.

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A movie screen has an area of 162 square meters and a perimeter of 54 meters. What are the dimensions of the screen?

ololo11 [35]

Answer:

18 meters by 9 meters (or 9 meters by 18 meters)

Step-by-step explanation:

lets say the dimensions are x and y. we have x*y=162, and 2x+2y=54. from the second equation we have x+y=27 so y=27-x. plug this into the first equation to get x(27-x)=162 or -x^2 + 27x = 162. x^2 - 27x + 162 = 0. simplify to get (x-18)(x-9)=0. so x=18 or x=9. when x=18, y=9, when x=9, y=18 so the dimensions are 18 by 9 meters

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3 years ago

Which ordered pairs need to be removed to make the graph a function?

fiasKO [112]

Answer:

option c

Step-by-step explanation:

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4 years ago

ahrayia [7]

Answer:

$(\sqrt{30}-2\sqrt{5})\ m$

Step-by-step explanation:

we know that

The length of the side, s, of a cube with a surface area, SA is equal to the formula

$s=\sqrt{\frac{SA}{6}}$

Step 1

Find the length of the side, s, of a cube with a surface area of $180\ m^{2}$

we have

$SA=180\ m^{2}$

substitute in the formula

$s=\sqrt{\frac{180}{6}}$

$s=\sqrt{30}\ m$

Step 2

Find the length of the side, s, of a cube with a surface area of $120\ m^{2}$

we have

$SA=120\ m^{2}$

substitute in the formula

$s=\sqrt{\frac{120}{6}}$

$s=\sqrt{20}=2\sqrt{5}\ m$

Step 3

Find the difference of the length sides

$(\sqrt{30}-2\sqrt{5})\ m$

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3 years ago

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A bag contains a variety of different colored marbles. P( red)= 1/2, P( green) = 1/4, and P( red and green) = 1/8 , which statem

Veronika [31]

Answer:

Step-by-step explanation:

The 1 choice. The events are independent because P(red) ×P(green)= P(red and green)

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4 years ago

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Elenna [48]

Answer:

The upside down u is where two given sets intersect and overlap

Step-by-step explanation:

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