1. Pressure P (in pounds per square foot) on a diver at a depth of D feet. Solve for D: P=64d+2112

2. The selling price of a pair of pants is $34. If the store paid $8 less for the pants, find the price the store paid.

3. The sum of three numbers is 123. The second number is 9 less than two times the first number. The third number is 6 more than three times the first number. Find the three numbers.

Question

Rashad Hurst

Mathematics

27 October, 05:20

1. Pressure P (in pounds per square foot) on a diver at a depth of D feet. Solve for D: P=64d+2112

2. The selling price of a pair of pants is $34. If the store paid $8 less for the pants, find the price the store paid.

3. The sum of three numbers is 123. The second number is 9 less than two times the first number. The third number is 6 more than three times the first number. Find the three numbers.

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Answers (1)

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Lydia Elliott · Answer 1

1. P=64d+2112; solve for D.

P=64d+2112

P - 2112 = 64d

(P - 2112) / 64 = d

2. The store is selling pants for $34, but they bought it for $8 less.

34 - 8 = 26

They paid $26 for the pair of pants.

3. x + y + z = 123

y = (2x) - 9

z = (3x) + 6

x + (2x - 9) + (3x + 6) = 123

6x - 3 = 123

6x = 126

x = 21

y = 2 (21) - 9

y = 42 - 9

y = 33

z = 3 (21) + 6

z = 63 + 6

z = 69

20 + 33 + 69 = 123

The three numbers are 21, 33, and 69.