Solve by substitution. 7x+2y=-19 and - x+2y=21

Factor to find the zeros of the function defined by the quadratic expression. 5x2 + 25x + 30

What do you notice about the sign of the product of two negative integers

There are d boys in the class. This is two more than four times the number of girls (X). How many girls are there in the class?

15/55 in simplest form

The product of 8/15, 6/5, and 1/3 is

Let's say that 64% the people on an island are get a rash when they touch a poisonous plant. studies have shown that these people must have at least one copy of a particular dominant allele.

What is the solution to the equation square root 2x+10 - 6=2

The sum of three consecutive odd numbers is 105 what is the smallest out of the three

State whether the data are best described as a population or a sample. To estimate size of trout in a lake, an angler records the weight of 11 trout he catches over a weekend.

A recipe calls for 2 1/2 cups of flour to make 2 dozen cookies. How many cups of flour would be required to bake 15 dozen cookies?