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2 years ago

Joe drives 20 mi-in 1/2 h. how Long Will it take him to derive 50 mi?

1 answer:

7 0

An hour and 15 minutes. Since Joe is driving 20 miles per 1/2 hour that means he is driving 40 miles every hour. We still have 10 miles left and since 20 divided by 2 is ten you would simply cut the time it takes him to drive 20 miles in half making 15 minutes. Then you add the time it takes to drive 40 miles and 10 miles and that's how you get an hour and 15 minutes. Hope this made sense!

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Answer:

Step-by-step explanation:

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2 years ago

The difference between 2 numbers is 8. The sum of the two numbers is 20. Find the number.

Igoryamba

Answer:

The numbers are 6 and 14

Step-by-step explanation:

Let the two numbers be x and y

x-y = 8

x+y = 20

Add the two equations

x-y = 8

x+y = 20

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2x = 28

Divide by 2

2x/2 = 28/2

x = 14

Subtract the two equations

x-y = 8

-x-y = -20

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-2y = -12

Divide by -2

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2 years ago

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Taylor opened a savings account with $425. After 2 years, the total interest earned was $10.20. What was the annual interest rat

storchak [24]

Answer:

R = 1.2%

Step-by-step explanation:

Given the following data;

Principal = 425

Time = 2

Simple interest = 10.20

To find the annual interest rate;

Mathematically, simple interest is calculated using this formula;

$S.I = \frac {PRT}{100}$

Where;

S.I is simple interest.
P is the principal.
R is the interest rate.
T is the time.

Substituting into the equation, we have;

$10.20 = \frac {425*R*2}{100}$

$10.20 = \frac {850R}{100}$

Cross-multiplying, we have;

$1020 = 850R$

$R = \frac {1020}{850}$

R = 1.2%

Therefore, the annual interest rate is 1.2 percent.

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2 years ago

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zhannawk [14.2K]

Answer:

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Step-by-step explanation:

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