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math help pleaseee easy 10 points?
List the function value
f(6) if f(x)=4x f(8) if f(x)=x + 11
f(5) if f(x)= 3x-2
f(3) if f(x) = 2x + 4
f(2/9) if f(x) =3x + 1/3
f(-6) if f(x)= 4x+ 7
f(3/4) if f(x)= 2x - 1/4
f(-14) if f(x)= 2x-3
f(4/5) if f(x) = 4x - 5
f(8) if f(x)=x + 11
4 Answers
- Anonymous1 decade agoFavorite Answer
(a) f(x)=4x, then f(6)= 4*6 = 24 [replace x with 6]
(b) f(x)=x + 11, then f(8) = 8 + 11 =19
(c) f(x)= 3x-2, then f(5) = 3*5 - 2= 15-2=13
(d) f(x) = 2x + 4, then f(3)= 2*3 + 4 = 10
(e) f(x) =3x + 1/3, then f(2/9) = 3(2/9) + 1/3 = (2/3)+(1/3) = 1
(f) f(x)= 4x+ 7, then f(-6) = 4 *(-6) + 7 = -17
(g)f(x)= 2x - 1/4, then f(3/4)= 2(3/4) - 1/4 = 5/4
(h) f(x)= 2x-3, then f(-14) = 2(-14) - 3 = -31
(i) f(x) = 4x - 5, then f(4/5) = 4(4/5) - 5 = -9/5
(j) f(x)=x + 11, f(8)= 8 + 11 =19
AJM
Source(s): General Ability in Maths - 1 decade ago
f(6) = 24
f(8) = 19
f(5) = 13
f(3) = 10
f(2/9) = 1
f(-6) = -17
f(3/4) = 5/4
f(-14) = -31
f(4/5) = -9/5
f(8) = 19
- 1 decade ago
Just substitute what x is in the equation, for example, the first one gives you f(6) if f(x)=4x, substitute 6 for the x. and so on.
wpf.
- Anonymous1 decade ago
f(6)=4*6=24
f(8)=8+11=19
f(5)=13
f(3)=10
f(2/9)=1
f(-6)=-17
f(3/4)=1/2
f(-14)=-31
f(4/5)=-9/5
f(8)=19
Source(s): Math Major
