3 years ago

How do you solve this?

Mathematics

1 answer:

expeople1 [14]3 years ago

7 0

Can you posted a picture

You might be interested in

Simplify expression show step by step <br> (-2i)(8i)

TiliK225 [7]

Answer:

Step-by-step explanation:

<u>Remember that $i^2 = -1$ </u>

(-2i)(8i)

$-16i^2$

$-16(-1)$

5 0

3 years ago

Using calculus, it can be shown that if a ball is thrown upward with an initial velocity of 16 ft/s from the top of a building 7

Karolina [17]

Answer:

[0, 7]

Step-by-step explanation:

We want the height to be greater than or equal to 32 ft, so ...

704 +16t -16t^2 ≥ 32

t^2 -t -42 ≤ 0 . . . . . . . . . . . subtract 32, divide by -16

(t -7)(t +6) ≤ 0

This inequality will be true for values of t between -6 and +7. Since we're only concerned with times t ≥ 0, the appropriate solution interval is ...

0 ≤ t ≤ 7 . . . . [0, 7] in interval notation

6 0

4 years ago

An author is having a book signing at a store. He agrees to give 5% of his profit to literacy programs and 15% of his profit to

quester [9]

Answer:

160

Step-by-step explanation:

15% + 5% = 20%

80%=0.8

200x0.8=160

6 0

3 years ago

Please help I'm really bad at math and I can't get a bad grade can someone help me please max points

Ksivusya [100]

1. x greater than or equal to 4 (B)

2. x does not equal 4 (C)

3. A

4. B

5. B

6. A

7. B

8. C

(The pictures were out of order but i did it by number shown in the pictures. Hope this helps.)

5 0

3 years ago

Read 2 more answers

A train whistle is 580 Hz when stationary. It is coming toward you at 18.8 m/s. What frequency do you hear?

Usimov [2.4K]

Answer:

612 Hz.

Step-by-step explanation:

The frequency of the sound will be proportionally higher when coming towards you. The increase is related to the speed of the train.

So the frequency will be:

580 + (580 / 343) * 18.8

= 612 Hz.

This is called the Doppler effect.

4 0

3 years ago

Read 2 more answers