Evaluate expression 1/2a-5b when a = - 12 and b = - 3

One-fourth of a number is forty.

Find the x-intercepts of the polynomial function. State weither the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept.

If Walt's scooter can travel 53 miles on 1 gallon of gas, how far can his scooter travel on 2.5 gallons of gas?

Round 137,638 to the nearest whole number

Round 46.719 to one and two significant figures

What's the vertex for y=2x^2-12x+19

What is the decimal of 1/2 percent

The equation above can be used to calculate the volume V, of a pyramid with a height h and base with length l and width w. If the volume of a pyramid is 81inches^3, and l=w=3h, what is the length of the base of the pyramid in inches?

What is the relationship between the decimals 0.09 and 0.9

A group of winning ticket holders share equally 90,000,000 lottery. Before the money is divided, three more winning ticket holders are declared. As a result, each persons share is reduced to 5,000,000.