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3 years ago

What is question 8 and 9 I need help!!

Mathematics

2 answers:

AfilCa [17]3 years ago

8 0

8 is 2-1 ratio of red dots to blue dots.

9 is 30 girls will be on the trip.

MatroZZZ [7]3 years ago

5 0

Ratio is 2:1. Number 9 is 30 girls

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How do I write 5/12 as a product of a whole number and a unit fraction

N76 [4]

Answer:

5*1/12

Step-by-step explanation

A unit fraction is 1/x.

You try to find x*1/12=5/12.

x=5/12*12/1

x=5

5*1/12 is you answer

7 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

_______________________________________________

For the first account 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

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

For the second account 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.

$I = I_1 + I_2=1,280$

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

19b − -10b − -2b − -3b − 20b = 14 what does B=

Leona [35]

19b-(-10b)-(-2b)-(-3b)-20b = 14

14b=14 Simplify

b=1 Divide

You are posting a lot of these types of problems. Maybe the course you are taking is to difficult for you?

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4 years ago

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Vikki [24]

Answer:

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3 years ago

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Find the range for the measure of the third side of a triangle given the measures of two sides. 5 m, 11 m, ?

bixtya [17]

Answer:

Step-by-step explanation:

the length of the third side should be less than the sum of other two sides, that is 5+ 11 = 16 and it should be greater than the 5

6 < x < 16

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3 years ago