Find g(4) + f(1).
A.
-19
B.
-17
C.
-15
D.
-13
2007-03-20 02:49:48 · 4 answers · asked by skate_freely 1 in Science & Mathematics ➔ Mathematics
In order to answer a question like this, you need to plug in a value for the x's in each of the functions.
g(4) - plug in 4 for x:
g(4) = -4^2 + 1 = -15
f(1) - plug in 1 for x:
f(1) = 3(1) -5 = -2
g(4) + f(1) = -15 + -2 = -17
The answer is B. -17.
2007-03-20 02:53:35 · answer #1 · answered by Jessica Rabbit 2 · 0⤊ 0⤋
B, but only if g(x)=-(x^2)+1. otherwise, the -4^2 equals positive 16, making the total answer positive 15 which isn't up here.
2007-03-20 09:54:32 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It's so easy. Substitute 4 for x in the g(x) one and 1 for x in the f(x) one. I don't know why people have such trouble with functions. The answer is staring you in the face!
2007-03-20 09:54:01 · answer #3 · answered by BG 3 · 0⤊ 0⤋
g(4)=-4^2+1=-15
f(1)=3*1-5=-2
so:g(4)+f(1)=-17
the answer is b
2007-03-20 12:45:52 · answer #4 · answered by shiva 3 · 0⤊ 0⤋