If cos(x)cos(π/7)+sin(x)sin(π/7)= - (√2)/2, then x can equal:
(check all that apply)
a. (π/4)+(π/7)+2nπ

b. (5π/4)+(π/7)+2nπ

c. (7π/4)+(π/7)+2nπ

d. (3π/4)+(π/7)+2nπ

What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40

Plz me i need i will give a brain

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases