If 50% of a number is 20, what is 75% of the number

Mr. Harper's car used 5 gallons of gasoline to travel 150 miles. After he had some work done on the cars engine, it used it used 6 gallons of gasoline to travel 210 miles. If the price of gasoline was $3.50 per gallon, how much money did Mr.

Skaters complete one lap around a park that has the shape of a regular Pentagon. What is the sum of the angles through which they turned

1. - 3x-8=10 solve for x 2. (2.3*10^-3) (3*10^8) give answer in scientific notation

An airplane descends at a rate of 2,700 feet per minute. Once the airplane starts its descent, what will be its change in elevation after 3 1/2 minutes?

Calcule (x+2y) DA onde D é a região limitada pelas parábolas y = 2x² e y = 1 + x².

A 13.9 gallon gas tank is 4/5 full. How many gallons will it take to fill the tank?

Which value is equivalent to x-7/7-x A) - 7 B) - 1 C) 1 D) 7

What is the complete factorization of the polynomial below x^3-4x^2+x-4? A. (x-4) (x+i) (x-1) B. (x+4) (x+i) (x-i) C. (x+4) (x-i) (x-i) D. (x-4) (x-i) (x-i)

10/21 divided by (-15/7)

Chris and 3 friends shared 3/4 of a bag of popcorn equally. How much popcorn did each person get?