Two horizontal lines are cut by a transversal. what is the least number of angle measures you need to in order to find the measure of every angle

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.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?