Let r(x)=x^2.If r(x)=4,find x A.2
B.-2
C.4
D. Both 2 and -2 are correct
E. None of these choices are correct

Sunday: 1 1 2 monday: 1 tuesday: 2 1 2 wednesday: 1 3 4 thursday: 2 friday: 1 1 2 saturday: 2 jenna is a swimmer and trains every day. the schedule shown outlines the number of hours she trains each day. what is the total number of hours that jenna trains during the week?

Witch represents the inverse of the function f(x)=1/4x-12

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out