How can I Factor the expression below 9x2-1

Nine more than twice a number is 23

Divide the school into classes and then randomly select students from each class is an example of:

What is the fractional portion of the solution to 5 3/8 + 2 3/12

Margo sold 3 times as many pears as apples in a week. She sold 3,456 apples and pears. How many pears did she sell? Use a letter to represent the unknown before solving.

A box of cereal has a volume of 336 cubic inches. If the width of the box is 4 inches and the length is 7 inches, what is the height of the box I'm confused

An animal gained 5 kilograms steadily over 10 years what is the unit rate kilograms per year

Which ordered pair is a solution of the equation? 2x+3y=10?

Two less than the product of a number and - 5 is - 42

A plane flies from New York to Los Angleles at a constant speed of 800 km/hr. If the distnace from New York to Los Angeles is 4000 km how long will it take the plane to fly that distance?

Anna bought a sandwich for 2.49 and a drink for 1.55. She gave the clerk 5.05. How much change should she get back?