Halp

Select the expression that is equivalent to (m^-4)(-3m^-6)(-m^7)

-1/3m^168
3m^168
-3/m^3
3/m^3

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate. in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°