How to solve 7 + (-15) + 12

Peter elf had 149 presents (not all for him) on christmas eve. on christmas day, he received 132 more presents and he gave away 128 presents. how many did he have to open for himself on christmas day?

The width of a rectangle is 8 inches shorter than its length. The perimeter of the rectangle is 18 square cm. What are the length and width? Which equation models this problem? A. 8 x L = 18 - 8 B. L (L - 8) = 18 C. L + (8 + 2L) = 18 D.

Which scenario, when graphed, would produce a nonlinear function? A. a graph comparing weekly savings (y) to Adam saving $10 each week (x) B. a graph comparing total amount saved (y) to when Mark saves $10 each week (x) C.

A factory has a machine that makes steel rods. The length of rids that the machine makes follows a normal distribution curve with a mean of 11.5 feet and a standard deviation of 0.3 feet.

A number times 5 increased by 4 is equal to that same number. Find the number.

7 rectangles in every 140 cm. how many rectangles will be presented in 220 cm

Which graph represents the solution set of this inequality? 9-4d≥-3

How many $10 bills are the same as ten $1 bills

What is the sum of the arithmetic series below? Use the formula for the sum of an arithmetic series. 18 ∑ 2i-9 i=1

What is the value of x? 3x-8=8x+4/2