Ican't solve this equation pleas ! x^2+2x+8=0

What is the exact volume of the cylinder 1.5 m 2.5 m

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.