An engineer was supposed to draw a line exactly 27/32 inch long. An error was made, and he drew the line 31/32 inch. how much longer was the line that the engineer drew?)

1/8 of an inch

Step-by-step explanation:

Since the denominator is the same, we only need to subtract the numerator
31 - 27 = 8.

Now we have to simplify 8/32.

Divide both sides by 8, and you get 1/8
The engineer drew the line 1/8 of an inch longer than needed.

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.