False, they actually decreased some.
Answer: The cost of 7 roses and 8 petunias is $41.
Step-by-step explanation:
Given, Bethany sells roses and petunias. The expression
, gives the cost (in dollars) of r roses and p petunias.
Now to find the cost of 7 roses and 8 petunias , put r= 7 and p= 8 in the above expression , we get

Hence, the cost of 7 roses and 8 petunias is $41.
Answer:
-7
Step-by-step explanation:
y=mx+b where b= y-intercept