Which of the following expressions represents a function? a. {(1,2), (4,-2), (8,3) , (9,-3)} b. y^2=16-x^2 c. 2x^2+y^2=5 d. x=7

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7

If point a= (10,4) and b= (2,19) what is the length of ab 17 units 15 units 23 units 12 units