<span>4a - j = 7a + 3
4b - k = 7b + 3
None of the answers are true, a b are always b minus.</span>
This is one way you could write out the steps
f(x) = -2x^2 - 5
f(2) = -2(2)^2 - 5
f(2) = -2(4) - 5
f(2) = -8 - 5
f(2) = -13
Check the picture below.
so, that'd be 20.24845673131658693325, and to the nearest tenth it'd then be 20.2