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3 years ago

This step works because of the ______

Mathematics

1 answer:

ikadub [295]3 years ago

5 0

The answer is B( distributive property).

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If a ball is thrown into the air with a velocity of 34 ft/s, its height (in feet) after t seconds is given by y = 34t − 16t2. Fi

Finger [1]

ANSWER:

If a ball is thrown into the air with a velocity of 34 feet per second, then velocity of the ball after 1 second is 2 feet per second

SOLUTION:

Given, a ball is thrown into the air with a velocity of 34 feet per second

Initial velocity (u) = 34 feet per second

And also given a relation between displacement and time = $\mathrm{y}=34 \mathrm{t}-16 \mathrm{t}^{2}$ --- eqn 1

We need to find the velocity when t = 1 ; v = ?

We know that, v = u + at and $\mathrm{s}=\mathrm{ut}+\frac{1}{2} \mathrm{at}^{2}$

where v is instantaneous velocity and u is initial velocity

a is acceleration

t is time interval

s is displacement

using the displacement and time relation eqn (1) we get

Now, when t = 1, displacement s = 34(1) – 16(1)

$\mathrm{ut}+\frac{1}{2} \mathrm{at}^{2}=34-16$

$34 \times 1+\frac{1}{2} \times a \times 1^{2}=18$

$34+\frac{a}{2}=18$

$\begin{array}{l}{\frac{a}{2}=18-34} \\\\ {\frac{a}{2}=-16} \\ {a=-16 \times 2} \\ {a=-32}\end{array}$

here, -ve sign indicates that object is in deceleration . so acceleration is -32 ft/s

now put a value in v = u + at

v = 34 + (-32)(1)

v = 34 – 32

v = 2 ft/s

Hence, velocity of the ball after 1 second is 2 ft/s

6 0

3 years ago

Ninety percent of the 30 students were right handed what percent of the students were left-handed?

Dennis_Churaev [7]

To find out how many students were left handed, we know that if 90% were right handed, then 10% have to be left handed.

30 students x 0.10 = 3 students left handed

7 0

4 years ago

1. Bailey withdrew $135 from her checking account. Write an algebraic expression that describes Bailey's action.

MArishka [77]

Answer:

c − 135

Explanation:

Let's say that the amount of money in Bailey's checking account is

c dollars.

We also know that she took away $ 135

From this variable and number, we can state the algebraic expression

c − 135

<h2>Hope this helps!</h2>

7 0

3 years ago

Follow the link I have the paper, but i'm so confused on what I need to do can someone help? if you can Thanks https://www.brain

Sergio [31]

Answer:

You've got to use the clues on the side to help figure out the answers for each square

8 0

3 years ago

1+1

Stells [14]

The answer would be more likely 2

3 0

4 years ago

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