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The weight of a goat increased by 12 pounds is 38 pound. Write an equation to represent the situation

Diane's food Bill was $48. She left the waiter a tip of $9.60
What was the percent of tip Diane left for the waiter?

What is the interest for a principal of $3200 at a simple annual interest rate of 3.1% over a 2 year period?

Respuesta :

devinfraser
1. w + 12 = 38
w + 12 - 12 = 38 - 12
w = 26
His weight was 26 lbs.

2. 9.60/48 = .2
0.2 * 100 = 20%
She left a 20% tip.

3. 3.1 * 2 = 6.2
0.062 * 3200 = 198.40
The interest is $198.40.

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