4x^2=400

a. 4x=±20
b. x=±5
c. x=±10
d. x=±20

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is