6x + 39 (if x = 10)..

99

Step-by-step explanation:

x=10 we know that

so then we have 6 lots of 10s

that is 60

next step is 60+39

that equals to 99

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here