Question

The function for the cost of materials to make a muffin is f(x) = Three fourths x + 3, where x is the number of muffins. The function for the selling price of those muffins is g(f(x)), where g(x) = 3x + 4. Find the selling price of 20 muffins.

Answer 1

Choice.

Answer 2

f(x) = (3/4) x + 3

then x=20...
first find f(x) then find g(f(x)).......
then goon....

Answer 3

18

49

51

58

Answer 4

would it be 18

Answer 5

f(x) = (3/4) x + 3
g(x)=3x+4
selling price = g(f(x))

how to find/interpret g(f(x)) ?

Answer 6

reply

Answer 7

No 58 is answer....

Answer 8

can you explain it please

Answer 9

First find f(x) = (3/4) x + 3
i.e., f(20) then insert that value in g(x)

Answer 10

g(f(x))

g(3/4x+3)

3(3/4x+3)+4

now plugin x=20

Answer 11

given x=20 then
f(20)=(3/4)(10)+3=18
then g(18)=3(18)+4=58
thats it.....

Answer 12

ohh okay thank you @chetan552
and @Nurali if i plug it in 3*15=45+4=49

Answer 13

x=20 then
f(20)=(3/4)(20)+3=18

Answer 14

\[3(\frac{ 3 }{ 4 }(20)+3)+4\]

\[3(3(5)+3)+4\]

\[3(15+3)+4\]

\[3(18)+4\]

\[54+4\]

Answer 15

\[58\]

Answer 16

no 3/4 *20 is 15

Answer 17

many have done the math, 58 is your answer if you are looking for confirmation

Answer 18

3/4 of 20 PLUS 3 = 18

Answer 19

ohh okay thank you

Answer 20

g(18) = 58

Answer 21

Anytime.

Answer 22

Welcome to Openstudy @anastasiad239