What is the best answer for r^2-9

How to divide 7.96 by 5

Train A is traveling 50mph and starts 100 miles from the station. Train B is traveling 40mph and starts 130 miles from the station. When and where will train A catch train B?

What is 2/3 divide by 3

7x + 8 - 4 when x=5 and y=3

M and M, Inc. produces a product that has a variable cost of $4.20 per unit. The companys fixed costs are $45,600.

In 1940 the life expectancy at birth in the general public was 62.9 years. By 1980, it had risen to 73.7 years. Assuming a linear relation, which is the best prediction of life expectancy in the year 2000?

What the sum of the first seven terms 4,12,36,108

A savings account with $500 now has $120.

Bradley made a house for his dog, Bowser, out of wood with a cube base and a triangular prism top. The dimensions of the dog house are a = 5 feet, b = 1 foot, and c = 2.7 feet. Note: Figure is not drawn to scale.

8x=24 is 8x=24:4 the same