Twice the sum of a number and 9 equals 7.

Use the variable y for the unknown number.

If 40% of students like the museum and there are 20 students, how many students liked the museum?

A slice is made parallel to the base of a right rectangular pyramid, as shown. What is the area of the resulting two-dimensional cross-section? Enter your answer in the box. Rectangular pyramid intersected horizontally by a rectangle.

Simplify the expression 2 (x+4)

The sum of the three number is 92. the third is 3 times the first, the first number is 7 less than the second. what are the numbers?

Jenny recorded the effects of eating spinach on her health. Which of these is a control variable? A. Both eating spinach and Jenny health B. Jenny health C. Eating spinach D. neither eating spinach or Jenny health

During a 30% off sale, Lourdes pays $140 for a swing set. What was the original price of the swing set?

A sports team has b teams. each team has 7 players. using b, write an expression for the total number of players in the tournament

Which expression is equivalent to 2.2-2.5 ?

Which expression is equivalent to - 4 (X+2) - 1/2 (2X-6

15 is less than or equal to 20+11+k/3 is less than or equal to 19