$\displaystyle 4x^2 + 3$ when x = 5

103

Evaluate 2a - 3 when a = -5

-13

Evaluate -2a + 6b when a = 6 and b = -3

-30

Not sure if it should be-12a + -18btho

Evaluate (x + 1) 2 - 5 when x = -3

-9

Evaluate c - 3d when c = 1 and d = 1/3

0.1

Or should it bec - 0.9d?

x + x^3 - 4 x^4 when x = 2

-54

Not sure if this should be-54x

5a + 3a^2 when a = -3

12or12a?Find F when c = 15 in the formula F = 9C/5 + 32

F = 59I'm not sure if I should leave the variables in or not.

*mistook it for an almost-identical question in which all that was different was that c = 30