Answer:
See below
Step-by-step explanation:
we have f(x) = -(x-7) + 3
and we want to find f(4)
essentially, f(4) means that the input is 4 and to find the output we plug in the value of the input where ever x is and evaluate.
So for f(x) = -(x-7) + 3
To find f(4) we replace all x's with 4
f(4) = -(4-7) + 3
we now evaluate
==> subtract 7 from 4
f(4) = -(-3) + 3
==> apply two negative rule ( basically if there are two negative signs they cancel out and the number turn positive )
f(4) = 3 + 3
==> add 3 and 3
f(4) = 6
For this case we make a rule of three:
jar ---------------> 
pizza
x -----------------------------------------> 1 pizza
Where the variable "x" represents the amount of sauce jars to make a pizza.
So, you need 
jars of sauce to make a pizza.
Answer:
75 = 5 x 3 x 5
We can solve this using a factor tree.
75
/ \
5 15
/ \
3 5
The equation is 9t = p. Multiply 9 by the number of hours and you will get your gross pay.
If you work 30 hours a week 9(30)=p then your gross pay would be 270, because you worked 30 hours and got payed 9 dollars for each hour.
