Answer:
x=-62/13
Step-by-step explanation:
13x+104=42
13x=42-104
13x=-62
Answer:

Step-by-step explanation:
We can find the side of the hypotenuse by applying pythagorean theorem.




Now we can apply pythagorean theorem on the other triangle





Answer:
Step-by-step explanation:
130+5x=180
130-130+5x=180-130
5x=50
x=10
First you would have to multiply 12 times 5 (60) then multiply 7 times 18 (126) you subtract both [ 126 - 60] = (66) that would be your final answer. They both need to have worked 66 minutes to have the same number of boxes.