Which pair of ratios is proportional and why/how?
a. 5ft: 7 sec and 20ft: 28 sec
b. 3 yd: 15 mi and 15 yd: 75 mi

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.

If value of cos330° is √3/2 then find tan165°.

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).