Step-by-step explanation:

Solve b part yourself in the same way.
Because both positive and negative values have<span> a positive </span>absolute value.
Answer:
When you move the decimal point one place to the left, you are moving the second by a factor of 10.
Step-by-step explanation:
$8 + $7 + $13 + 15 = $43
$x - $43 = $12
x = $55
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Answer:
x = 52
Step-by-step explanation:
This is a picture of a right angle, which is 90 degrees. We should first make an equation to represent this problem.
(x - 12) + 50 = 90
1. Subtract 50 from both sides of the equation.
(x - 12) = 40
2. Add 12 from both sides of the equation
x = 52
The value of x is 52.