How to show that a function is surjective?

If 4x^2-100=0 the roots of the equation are

7 (s-3) = 21 I need this problem worked out

Six times a number is equal to eight more than five times the number

How do you solve equation elimination? -7x-8y=9 -4x+9y=-22

The minute hand on a clock made a 1/4 turn how many degrees did it turn

What's the difference between linear and non linear functions

32 mystery books and 56 biography books, each shelf has the same number of books on them, how many books go on each shelf and how many shelves for each type of book

Write the out the equation - 52 times the difference between a number and 97 is equal to the number plus 39

A pair of jeans is on sale for 25% off the original price. Which expression represents the sale price? If the original price of the jeans is $40, evaluate the expression to find the sale price.

What is 62 percent of 25?