Answer:
Step-by-step explanation:
If 
then
by combining like terms. (I'm thinking you might have mistyped the problem because this representation is weird).
15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
Answer:
There is no way to know.
Step-by-step explanation:
You need to know how much either burritos cost or how much tacos cost to answer that, let your teacher know.
Answer:
650
Step-by-step explanation:
651.606881968=P
round: 650
Answer: 300*0.73^x
Step-by-step explanation:
300 is the initial value and every time x goes up by 1, the value get multiplied by 0.73
when x=3
then the value would be 300*0.73*0.73*0.73 or 300*0.73^3
then for x amount of times the equation would be 300*(0.73 x times ) or 300*0.73^x
