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Anon25 [30]
3 years ago
10

Help :

Mathematics
2 answers:
andre [41]3 years ago
4 0
What they said mark them brainiest ^^^
qwelly [4]3 years ago
3 0

A) x + 8 = 28

x = 28 - 8

x = 20

B) y - 4 = 30

y = 30 + 4

y = 34

C) s + 2s = 36

3s = 36

s = 12

D) t - t + 4t = 16

4t = 16

t = 4

E) 5a = 15

a = 3

F) 8x - x = 21

7x = 21

x = 3

\\

<h3><em>KemberlyJ</em></h3>
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What is the prime factorization of 120
Firlakuza [10]
2,60,2,30,2,15,3,5,1
6 0
3 years ago
[{78 + (-13)} -8] · (-10) + 10
OlgaM077 [116]

Answer:

5210

Step-by-step explanation:

You start with everything in parentheses so it is 78+ (-13) first. then you multiply it by -8 after multiply again but by (-10) then add 10.

5 0
3 years ago
Last year, Keiko had $20,000 to invest. She invested some of it in an account that paid %7 simple interest per year, and she inv
erma4kov [3.2K]

Answer:

P_2 = \$6,000\\P_1 = \$14,000

Step-by-step explanation:

The formula of simple interest is:

I = P_0rt

Where I is the interest earned after t years

r is the interest rate

P_0 is the initial amount

We know that the investment was $20,000 in two accounts

_______________________________________________

<u><em>For the first account</em></u> r = 0.07 per year.

Then the formula is:

I_1 = P_1r_1t

Where

P_1 is the initial amount in account 1 at a rate r_1 during t = 1 year

I_1 = P_1(0.07)(1)\\\\I_1 = 0.07P_1

<u><em>For the second account </em></u>r = 0.05 per year.

Then the formula is:

I_2 = P_2r_2t

Where

P_2 is the initial amount in account 2 at a rate r_2 during t = 1 year

Then

I_2 = P_2(0.05)(1)\\\\I_2 = 0.05P_2

We know that the final profit was I $1,280.

So

I = I_1 + I_2=1,280

Substituting the values I_1, I_2 and I we have:

1,280 = 0.07P_1 + 0.05P_2

As the total amount that was invested was $20,000 then

P_0 = P_1 + P_2 = 20,000

Then we multiply the second equation by -0.07 and add it to the first equation:

0.07P_1 + 0.05P_2 = 1.280\\.\ \ \ \ \ \ \ \ +\\-0.07P_1 -0.07P_2 = -1400\\-------------

-0.02P_2 = -120\\\\P_2 = 6,000

Then P_1 = 14,000

4 0
3 years ago
Myla spends about 35% of a 24-hour day at work. How much time does she spend at
Katena32 [7]
Ok i will help you ... hold on
8 0
3 years ago
When he exercises after work,Marcus runs an average mile in 8.3 minutes. At this average, how many miles will he run after 36 mi
KIM [24]

He will run 4.3 miles in 36 minutes.

Step-by-step explanation:

Given,

8.3 minutes running = 1 mile distance

In one minute;

1 minute running = \frac{1}{8.3}\ miles

After 36 minutes;

36 minutes running = 36*1 minute running distance

36 minutes = 36*\frac{1}{8.3}

36\ minutes=\frac{36}{8.3}\\36\ minutes= 4.3 miles

He will run 4.3 miles in 36 minutes.

Keywords: distance, speed

Learn more about distance at:

  • brainly.com/question/10772025
  • brainly.com/question/10879401

#LearnwithBrainly

4 0
3 years ago
Read 2 more answers
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