An 8 by 18 ft wall has three 4 by 5 ft windows. the area of the three windows is what percent of the area of the entire wall (including the windows) ?

The Farm Agency is to use only the letters A, B, and C to make tags. Let y be the number of tags they can make using n spaces. What is the formula for the number of tags they can make?

Write the rule of this pattern 5,20,80,320

At an amusement park, a person spends $30 on admission and food, and then goes on r number of rides that cost $2 each

A factory makes TV's and video machines. Checking for faults regularly, on average, 5 out of every 300 TV's are faulty and 8 out of every 200 video machines are faulty.

What is the perimeter of this?

What is the answer for -4x+4y=12 3x-4y=-18

rachel is frosting the top of two cakes and wants to know which cake will require more frosting. one cake is round with a diameter of 8 inches. the other cake a square with the length of 9 inches.

What is this 4x + 6 = 10

What is the difference? Express your answer in lowest terms. - 1/10 - (-8/10)

A and b are positive integers. Find 2a+3b if a^2b^3=108