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Strike441 [17]
3 years ago
14

Evaluate the expression for x= 2 and y=4. Enter your answer in the box. 16x + 2x2 - y2​

Mathematics
1 answer:
Nostrana [21]3 years ago
8 0

Answer:

24

Step-by-step explanation:

Step 1: Define

x = 2

y = 4

16x + 2x² - y²

Step 2: Substitute and Evaluate

16(2) + 2(2)² - 4²

32 + 2(4) - 16

16 + 8

24

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A boulder falls off the top of a cliff during a storm. The cliff is 90 feet high.
andreev551 [17]

Answer:

It will take the boulder approximately 4.28 seconds to hit the road

Step-by-step explanation:

The given height of the cliff from which the boulder falls, h = 90 feet

The equation that can be used to find the time it takes the boulder to fall is h = u·t + (1/2)·g·t²

Where;

h = The height of the cliff = 90 ft.

u = The initial velocity of the boulder = 0 m/s (The boulder is assumed to be at rest when it falls)

g - The acceleration due to gravity ≈ 9.81 m/s²

t = How long it will take for the boulder to hit the road below

Plugging in the values gives;

90 = 0 × t + (1/2)×9.81×t² = 4.905·t²

∴ t = √(90/4.905) ≈ 4.28

The time it takes the boulder to hit the road, t ≈ 4.28 seconds.

7 0
2 years ago
To play the lottery in a certain state a person has to correctly select 5 out of 45 numbers
nika2105 [10]

is that a true or false kind of question or what is it meant to be?

5 0
2 years ago
Dependent and Independent variables? I am plotting points on a scatterplot and I'm not sure where to place my variables. The num
IrinaK [193]

Answer:

The number of confirmed cases is the independent variable.

The number of deaths is the dependent variable.

Why?

<u>The number of deaths is dependent on the fact that there are cases, so the number of deaths is a dependent variable.</u>

4 0
3 years ago
PLEASE HELP ME I BEG OF YOU IF YOU HELP ME I WILL GIVE YOU BRAINTLIEST"Julie goes to the sports store and spends $40.50 before t
Pie

Answer:

6.25

Step-by-step explanation:

Plz give me brainleist like u said.

3 0
2 years ago
Mauricio divided two identical rectangles into equal parts. He colored one part of each rectangle. What is true about the areas
Ivenika [448]

Answer:

Areas of the colored parts are equal

Step-by-step explanation:

Given Mauricio divided two identical rectangles into equal parts.

Now given Mauricio colored one part of each rectangle. we have to tell about the true statement of colored parts.

Two identical rectangles means the rectangle having equal areas. He divides these two into equal parts and shaded one of each part

Let area of rectangle is x unit^{2}

∴ Colored part area = \frac{1}{2}xunit^{2}  →  (1)

Similarly, other rectangle area identical to above rectangle is  x unit^{2}

∴ Colored part area = \frac{1}{2}xunit^{2}  →   (2)

From above eq (1) and (2), we get

Areas of the colored parts are equal which is equals to \frac{1}{2}xunit^{2}


4 0
3 years ago
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