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3 years ago

2/3x = -12 how do you solve this

2 answers:

7 0

The answer is -18.

In order to find X you have to multiply each side by the reciprocal. 3/2 times 2/3 cancels out, then 3/2 times -12 equals -18.

KATRIN_1 [288]3 years ago

5 0

Answer:

You divide 2 by 3, then multiply by x, to get -12

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How many seconds will light leaving Los Angeles take to reach the following locations (a) San Francisco (about 500km), (b) Londo

kondor19780726 [428]

Answer:

a) It takes 0.0017s for the light to reach San Francisco.

b) It takes 0.033s for the light to reach London.

c) It takes 1.334s for the light to reach Mars.

d) It takes 149.7s for the light to reach Venus.

Step-by-step explanation:

Here we can solve this problem by using this following formula:

$s = \frac{d}{t}$

In which s is the speed(in km/s), d is the distance(in km) and t is the time(in s).

The light speed is 299 792 458 m / s = 299,792.458 km/s, so $s = 299,792.458$

(a) San Francisco (about 500km)

Find t when $d = 500$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{500}{t}$

$299,792.458t = 500$

$t = \frac{500}{299,792.458}$

$t = 0.0017s$

It takes 0.0017s for the light to reach San Francisco.

b) London(about 10,000km)

Find t when $d = 10,000$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{10,000}{t}$

$299,792.458t = 10,000$

$t = \frac{10,000}{299,792.458}$

$t = 0.033s$

It takes 0.033s for the light to reach London.

(c) the Moon (400,000km)

Find t when $d = 400,000$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{400,000}{t}$

$299,792.458t = 400,000$

$t = \frac{400,000}{299,792.458}$

$t = 1.334s$

It takes 1.334s for the light to reach Mars.

(d) Venus (0.3 A.U. from Earth at its closest approach).

Each A.U. has 149,59,7871 km.

So 0.3 A.U. = 0.3*(149,597,871) = 44,879,361.3. This means that $d = 44,879,361.3$ . So:

$s = \frac{d}{t}$

$299,792.458 = \frac{44,879,361.3}{t}$

$299,792.458t = 44,879,361.3$

$t = \frac{44,879,361.3}{299,792.458}$

$t = 149.7s$

It takes 149.7s for the light to reach Venus.

3 0

3 years ago

the art teacher is sending home a total of 3,150 projects before winter break if each of her 150 students had the same number of

Alenkinab [10]

Answer:

21 projects each

Step-by-step explanation:

3150 ÷150

4 0

3 years ago

Find the x-coordinate for the midpoint of AB if A(-3, 8) and B(-7,-6).

spayn [35]

x =-5

------

1) Since the Formula of the Midpoint is:

2) So Let's plug it into the formula the values, for A, and B

3) So the x coordinate of the Midpoint is x =-5

4 0

1 year ago

Solve this inequality: 3p – 16 < 20

Llana [10]

P < 12
1. add 16 over
2. divide all by 3

7 0

3 years ago

Read 2 more answers

I have a 75% grade right now. If I get about a 75% on my Mid-term exam, what percentage will my grade go up to?

Digiron [165]

If you're at a 75% in the class and get a 75% on the midterm, you will still have a 75% no matter how many points it's worth.

6 0

3 years ago

2/3x = -12 how do you solve this​

2/3x = -12 how do you solve this