Twice a number minus 4 is 16

Seven kids and three adults are going to the circus. Kid's tickets are on sale for only half the price of adult tickets. The total cost is $63. How much is one kids ticket? How much is one adult ticket?

Frank reads at least 24 pages but not more than 36 pages of a book. He reads 12 pages per hour. The number of hours Frank reads p pages is modeled by a function.

What is the value of 7/9 - 0.4

What is the missing step in solving the inequality 4 (x - 3) + 4 < 10 + 6x?

What is the equation for x+1, x+2, x+3

Assume that 80% of the people taking aerobics classes are female and simple random sample of n=100 students is taken. If the sample has exactly 90 females students would that be unusual?

1. How many different outcomes are possible if you choose one kind of wrapping paper (tissue, cellophane, foil) and one coloured ribbon (pink, yellow, orange, blue, red) 2.

What is the Y value of the vertex of the function F of X equals X - 3 X + 11

If a+b=12 and a-b = 8, what is the value of a^2+b^2?

In which quadrant is (1/2, - 1.8) ?