Answer:
-4x^2-28x
Step-by-step explanation:
Distribute
-4x(x) and -4x(-7)
-4x^2 and -28x
Answer:
A. Equation is 
B. Cost is $88
Step-by-step explanation:
A)
Suppose you rent for x hours and each hour costs $15.75
<u><em>How much would you need to pay?</em></u>

Moreover, there is a $25 dollar (fixed) deposit for renting, so that gets added to your payment. All in all, you have to pay 
This is the equation of renting a snowboard for x hours.
Equation is 
- Where x is the number of hours you rent the snowboard, and
- c is the total cost
B)
If you are renting from 8.30 to 12.30, you are basically renting for 4 hours.
To know how much it will cost, you simply plug in 4 into x (in the equation):

Cost is $88
Answer:
35/100
Step-by-step explanation:
You have to find how many juniors there are, so if you add 13, 20, and 2 you get 35. For the denominator you have to find the total number of students, so just add all of the numbers together to get 100. So there is a 35/100 chance that a randomly selected student is a junior.
Answer:
2.5
Step-by-step explanation:

Thus, constant of proportionality = 2.5
Answer:

c
1 cup of coffee
Step-by-step explanation:
Let's say c = coffee
5 cupcakes would cost 5*1.50 = 7.50
We can make an inequality :

c
Now we can solve the inequality
10 - 7.50 = 2.50
2.50/2.50 = 1
The maximum cup of coffee you can buy is 1
Hope this helps :)