What do you do when you don't know what X is

Nine less than a number n n is written as

Problem solving The temperature at 4pm was 65 degrees farenheit. The temperature dropped 5 degrees every hour from 4pm - 10pm. What is the temperature at 10pm? What are you doing, dividing or multiplying?

What is - $40.00 + $10.00

Write two subtraction facts related to 7 + 5 = 12

Question Hel Mr. Kieran drives 7 miles each way to and from his office. If he does this 3 days each week for 11 weeks, how many total miles will he drive?

Find the length of a rectangle which when cut in half has an area of 300 square inches and whose width is one-sixth of the length.

Which of the following expresion is equivalint to 2d (3d-4)

8.25% convert to a decimal then round to fourth decimal Place I

There are 5280 feet in 1 mile, how many feet are in 3.5 miles?

Determine whether a triangle can be formed with the given side length 10,3,15