What is the equation of the parabola that opens left, has the vertex at the origin, focus is (-4, 0), and directrix at x = 4?

Prove that 16^4-2^13-4^5 is divisible by 11.

Subtract and simplify. (-y^2 – 4y - 8) – (-4y^2 – 6y + 3) show how you got the answer if your answer is right i will mark you

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15