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Sergeeva-Olga [200]

3 years ago

13

HELP ASAP WILL MARK BRAINLIEST

1 answer:

nata0808 [166]3 years ago

3 0

Answer:

D

Step-by-step explanation:

Since James gave Malcolm a head start of 20 feet, Malcolm's line should start at 20 feet. So that rules out A. They were obviously going further so they went more feet, So C is ruled out because it shows them not moving, plus James didn't get a 15 foot head start which is what the C graph shows. Finally it's not B because if you look at the key at the bottom of every graph, it says that Malcolm is the dotted line, and B shows James getting a 20 foot head start, not Malcolm.

Hope this helps!

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An object is thrown upward from the top of a building with an initial velocity of 48 feet per second. The height h of the object

Lubov Fominskaja [6]

Answer:

5 secs

Step-by-step explanation:

The height of the object is given as:

$h = -16t^2+48t+160$

The moment when the object hits the ground, the height of the object will be 0 m.

Hence:

$0 = -16t^2+48t+160$

Solving this for t:

Divide through by 16 and move all parameters to the left hand side:

$t^2-3t-10 = 0$

$t^2 - 5t + 2t - 10 = 0\\\\\\t(t - 5) + 2(t - 5) = 0\\\\\\(t + 2)(t - 5) = 0\\\\\\=> t = -2, 5$

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3 years ago

The sum of twice a number and seven is 13. Find the number.

Furkat [3]

Answer:

<h2>The answer is 3</h2>

Step-by-step explanation:

Let the number be x

The statement

twice a number is written as

2x

The sum of twice a number and seven is written as

2x + 7

The result is 13

So we have

2x + 7 = 13

Subtract 7 from both sides

That's

2x + 7 - 7 = 13 - 7

2x = 6

Divide both sides by 2

That's

$\frac{2x}{2} = \frac{6}{2}$

We have the final answer as

<h2>x = 3</h2>

Hope this helps you

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4 years ago