R-12 evaluate if r = negative 3

What is the lcm of 14 and 42

Suppose Galileo and his assistant were 1 km apart when Galileo uncovered his lantern to try to measure the speed of light. How long would it have taken the light signal to reach his assistant?

What is 3x-5y=12 with a substitution of X=3y

Jimmy thinks a window frame in his house looks slanted because the corner doesn't appear to be 90 degree angle. His wife thinks it looks just fine.

Which sentence could be used to describe the equation 105 = 78 + y? The sum of 78 and a number is 105. The number 105 is more than 78. The sum of 105 and 78 is a number. Seventy-eight is more than the number one hundred five.

What is the upper quartile of 2,4,5,5,6,8,9

1 over 2 added to 2 over 5

In the figure below, triangle ABC is similar to triangle PQR, as shown below: what is the length side of PQ

One student ate 3/20 of all candies and another 1.2 lb. The second student ate 3/5 of the candies and the remaining 0.3 lb. What weight of candies did they each eat?

A 1/2 gallon of paint covers 1/6 of a wall. How much paint is needed to cover the entire wall? Could u show me how to do this question?