Question 455 points Signaler cette question Question 465 points Solve the proble

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Question 455 points

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Question 465 points

Solve the problem.

How much pure acid should be mixed with 5 gallons of a 50% acid solution in order to get an 80% acid solution?

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Question 475 points

Solve the problem.

Walt made an extra $10,000 last year from a part-time job. He invested part of the money at 2% and the rest at 3.75%. He made a total of $270.00 in interest. How much was invested at 3.75%?

Question 525 points

Solve the problem.

The sum of the squares of two consecutive even integers is 884. Find the integers.

Explanation / Answer

1) F = 9/5 C + 32

subtracting 32 from both sides

F - 32 = 9/5 C

multiplying both sides by 5/9

5 ( F - 32 ) / 9 = C

2nd option is correct

2) let x gallons of pure acid is mixed

x + .50 * 5 = .80 ( x+ 5 )

x = 15/2

x = 7.5 gal

option a is correct

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