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4 years ago

How do you subtract and add integers

1 answer:

6 0

1. Add a positive integer by moving to the right on the number line.
2. Add a negative integer by moving to the left on the number line.
3. Subtract an integer by adding its opposite.

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F(x) = –2x2 + 2x – 20 Find f(-8)

ioda

Answer:

x = 9/13

Step-by-step explanation:

You need to do PEMDAS to find your answer hope this helps

6 0

4 years ago

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A 10.0 mL sample of copper has a mass of 89.6 g. What is the density of copper?

nadezda [96]

Answer:

8.96 g/cm3

Step-by-step explanation:

89.6 divided by 10 is 8.96

4 0

3 years ago

A ball is dropped off the side of a bridge. After falling 1.55 s, what is its velocity?

NARA [144]

Answer:

15.19 m/s

Step-by-step explanation:

$v_f =v_i + at$ , where $v_f$ is the final velocity, $v_i$ is the initial velocity, a is the constant gravitational acceleration 9.8 m/s^2, and t is the time (seconds).

Since the ball is dropped off the bridge, its initial velocity is 0:

$v_f = 0 + at$

We can plug in 9.8 m/s^2 into a and 1.55 s into t:

$v_f = 9.8(1.55)$

$v_f$ = 15.19 m/s

4 0

3 years ago

Find the measure of a. Please help me as soon as you can, Thank you.

quester [9]

If you know the length of two sides and the measure of the angle between them, you can find the third side using the law of cosines: if $b$ and $c$ are known, and so is the angle $\alpha$ between them, the remaining side $a$ is given by

$a^2 = b^2+c^2-2bc\cos(\alpha)$

So, in your case, the expression becomes

$a^2 = 64+121-2\cdot 8\cdot 11\cdot \cos(32.2) =36.07$

This means that we can deduce the value for a by squaring both sides (we're not considering both signs of the root because it makes no sense to have a negative length:

$a = sqrt{36.07} \approx 6$

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4 years ago

When x =2 and y=5, z=8 what is the value of z ahen x =4 and y=9

Maksim231197 [3]

Answer:

4.9383

Step-by-step explanation:

4 0

3 years ago

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