What is the best way to answer questions with a X expression in the question. For example 3x + 10x=?

The graph below shows the hours students spent studying and their science test scores. Hours Spent Studying vs. Science Test Scores A graph has hours spent studying on the x-axis and test score on the y-axis.

How is commission calculated?

Is 5x+6y=1 a direct variation? (yes or no only) Is - 4x+9y=4 a direct variation? (yes or no only)

A baker can bake 20 cakes per hour. How long will it take him to bake 400 cakes

8x + y = 14 write the equation so that Y is a function of X

Simplify (4x2 - 8x + 16) / 4

What are the perfect cubes between 100 and 600

700 people are in a group. We'll use F to represent the first initial of their first name, L for the first initial of their last name. Each person is identified with a pair (F, L).

A jar holds 2 3/4 cups of water. How much is this in fluid ounces

chain is 6 inch taller than Nancy. Use n for Nancy's height. Write an expression for Chang's height.