The expression 4c gives the science test score that a student recives c correct problems. what score is for 18 correct problems
1 answer:
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Answer:
$8.5
Step-by-step explanation:
We need to propose a system of equations with the information provided to us.
two large pizzas and one small pizza cost $36:
where
: Large pizza
Small pizza
and the difference in cost between a large and small pizza is $5.25:
our system of equations is:
We are asked for the price of small pizza, so we must manipulate the equations in such a way that adding or subtracting them removes the variable L and we are left with an equation for S.
Multiply the second equation of the system by -2
and now we sum this with the first equation of the system:
simplifying the result:
and solving for S (the price of a small pizza)