A student answered 40 problems on a test correctly and received a grade of 80%. How many problems were on the test, if all the problems were worth the same number of points?

Step-by-step explanation:

80x/100 = 40

80x = 4000

x= 50 problems

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1