Which expression is equivalent to 7a4 - 28?

A) - 7 (a2 + 2) (a2 + 2)

B) 7 (a2 + 2) (a2 - 2)

Eliminate

C) 7 (a2 + 2) (a2 + 2)

D) 7 (a2 - 2) (a2 - 2)

If a normal distribution has a mean of 44 and a standard deviation of 8, what is the z-score for a value of 50?

Whats the value of Sin 60° + cos 60°?

Four less than a number divided by 3 is 20.

A research study was conducted to measure the time students focus on a task before being distracted. The box plots show the distributions of attention spans of high school and college students.

A book is marked 20% off. What percent of the original price is the sales price? (What percent do you still have to pay for?) If the original price is $55, how much will the sales price be? If the sales price rings up as $46.

The area of a square floor on a scale drawing is 36 square centimeters, and the scale drawing is 1 centimeter:5 ft. What is the area of the actual floor? What is the ratio of the area in the drawing to the actual area?

Can a cube with a base area of 121 square inches fit into a box that has a volume of 729 cubic inches

Solve 5 (x+3) - 2=2-x+9

Round 328 to the nearest ten

A health club surveyed 175 members about which types of equipment they had used in the past month. Of the 175 members, 117 had used treadmills, 89 had used stationary bikes, and 53 had used both types of equipment.