How do I get smart in math

What is the product (x-3) (2x^2-5x + 1)

A businessman buys 1,440 dozen pens at $2.50 a dozen and then sells them at a price of 25¢ apiece. what is his total profit on the lot of pens?

What is 1/9 as a decimal

I need to find the sum of - 1/3 + (-4/15)

If the function f is defined by function f of x (2 times x) plus 3, and if function f of a equals 11, what is the value of a?

Consider a picnic. if you want to buy enough hot dogs and buns without having any left over, you need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hot dogs (which usually contain 10 dogs).

The number of counties in state a and the number of counties in state b are consecutive even integers whose sum is 122. if state a has more counties than state b, how many counties does each state have?

Kevin is 4 years older than 3 times as old as Jasper. If j represents Jasper's age, which expression represents Kevin's age? A 3j-4 B 4+3j C 4 (3j) D 3j4

Is 5 a integer or a whole number or a rational number? or all?

Dana can travel 9 miles in her rowboat in 6 hours against the current. With the current, it takes 4 hours to row the same distance.