Total would be $37.10 and the tip would be $2.10
Answer:
you have to add similar elements
-4x-10x=-14x
Mark me brainliest if it helped
Step-by-step explanation:
f(4)=4+21
4+21=25
f(4)=25
You insert in 4 into the x and then solve from there and you have you're answer. So the output for that function is 25.