The answer would be 2 times whatever the value of x would be
Solve for x by cross multiplying then isolating the variable:

cross multiply
15x=90 Isolate the variable
x=6
Solve for y by cross multiplying then isolating the variable:

cross multiply
9y=90 Isolate the variable
y=10
Answer:
C
Step-by-step explanation:
You just find the rate of change. So you would divide 30/1 which equals 30. So the equation is y=30x.
17.4736843 or 17 remainder 45
He paid ...
-- The cost of the lunches (100% = 1.00 of it)
-- 15% of the cost as a tip (15% = 0.15 of it)
-- 12% of the cost as sales tax (12% = 0.12 of it)
Total that he paid = (1.00 + 0.15 + 0.12) = 1.27 of $248.40
= $315.47 .
Trevor is one generous guy !