Christa spends 50% of her weekly income on rent. If her rent is $400 each week, find her weekly income.

$800

Step-by-step explanation:

If she spends half (50%) of her weekly income on rent ($400), then to find her whole income, you need to find the other half. To do that, simply double $400.

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