What are compatible numbers for 12 and 21

Consider the steps to simplify the expression. What property of operation is used in Step 2? Expression: - 4 3 7 + 7 - 3 4 7 Step 1: = - 4 3 7 + 7 + (-3 4 7) Step 2: = - 4 3 7 + (-3 4 7) + 7 Step 3: = - 4 + ( - 3 7) + (-3) + ( - 4 7) + 7 Step 4: =

Gary is x years old today. Two years ago, his grandfather was 3 times older than Gary at that time. The age difference of Gary and his grandfather then was 48 years. Find Gary's grandfather's age today

The mean per capita consumption of milk per year is 138 liters with a standard deviation of 28 liters. if a sample of 60 people is randomly selected, what is the probability that the sample mean would be less than 132.

Is 13 x 10 ^5 in Scietific Notation? (^ means raised to the power of) Why or why not?

Find the y-intercept of the following equation. Simplify your answer. y = 6x + 4 y-intercept =

23. You spend $55 shopping for birthday gifts. You buy one of your friends 2 gift certificate for $15, and your other friend a pair of shorts for $16. You also buy your older brother 2 compact discs that each cost d dollars.

You paint 12 wall in 14 hour. At that rate, how long will it take you to paint one wall?

3. The circular stained glass window has diameter of 12 feet. What measurement is closest to the circumference of the window in feet?

The post office will accept packages whose combined length and girth is at most 42 inches. (the girth is the perimeter/distance around the package perpendicular to the length; for a rectangular box, the length is the largest of the three dimensions.

Is 27 a perfect square?