A+10=55 how do I solve this

How much would a man who weighs 50 Lb. on the moon weigh on earth?

Molly measured the distance her paper airplane flew. The Paper Airplane traveled 5 meters. How many centimeters did the paper airplane travel?

It takes 6 hours to fill a pool with the inlet pipe. It can be emptied in 12 hours with the outlet pipe. If the pool is 2/3 full to begin with, how long will it take to fill it from there if both pipes are open?

Together, two apples have 1/5 gram of fat. How many apples have a total of 4 grams of fat?

Write three ratios are equivalent to one given the ratio of right handed students to left handed students is 18:4

Find the inverse of the function f (x) = 5/6x + 10

Darren decided to gift wrap his present. He knows that his gift is in the shape of a cube and that one side is 5 ½ inches. Darren has 150 square inches of paper. Is this enough to wrap the gift? Explain your answer.

The sum of two numbers is 90. their difference is 12. what are the numbers?

Stat crunch in a random sample of 200 adults, what is the probability that less than 33 % have no credit cards?

There are 2.54 centimeters in an inch. when using this conversion factor, how many significant figures are you limited to?