Simplify. x+7/x^2+4x-21 a. 1/7+x ; where x= -7 b. 1/7x ; where x= 0 c. 1/7+x ; where x= 0, -7 d. 1/7

Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126