What's the area of a semicircle with 2 radius

What is double of 16

A student raises her average grade from a 75 to a 90. What is the percent of the increase in the students average grade

4/5/10 in simplest form

If 2x + 5y = 10 and x = 3y + 1, what is 11x + 11y?

Claire put $2 in her coin purse each day for 7 days. How much money is in her coin purse after 7 days?

Jade and jason play a game which each player is equally likely to win the first player win 3games becomes the champion and no future games are played if jason had won The first game what is the probability that jason becomes the champion

What is 257,650 rounded to the nearest ten

What is the radius of a circle whose equation is x2 y2 - 10x 6y 18 = 0?

Y=x+4 and y-4=x. Is there no solution one solution or infinitely many

How do you recognize a central angle of a circle