What's the area of a square computer screen with 21 inches sides

What are the steps to (5.2 - 4.5) - 5.5 4.8?

This act lowered the top tax rate from 50% to 28% ... ?

Gabrielle is 14 years older than Mikhail. The sum of their ages is 82. What is Mikhail's age?

Suppose $7,000 is deposited in an account paying 2% interest per year compounded monthly. Find the amount in the account after 20 years with no withdrawals

A 6th grade teacher can grade 25 homework assignments in 20 minutes. Is this working at a faster rate or slower rate than grading 36 assignments in 30 minutes

The rectangle below has an area of x^2-9 square meters and a width of x-3 meters. What expression represents the length of the rectangle?

Mr. Haney has 11 coins in dimes and quarters. The value of his coins is $2.15. how many dimes does he have?

Different varieties of field daisies have numbers of petals that follow a fibonacci sequence. Three varieties have 13,21, and 347 petals. How many petals do the next two varieties of field daisy have? a. 42, 55 b. 47,60 c. 42,50 d. 55,89

A certain hybrid car can travel 1 4/11 times as far as a similar non hybrid car can, each on one gallon of gasoline. If the non hybrid car can travel 33 miles per gallon of gasoline how far can the hybrid travel on 4/5 gallon of gasoline?

What is the value of 6x+4x+8, when x=7