Answer:
She saved $27
Step-by-step explanation:
Search "what is 30% of $90"
It says 27 US$
Do you see a pattern in the given information?
3 pages in 13 min
9 pages in 39 min
15 pages in 65 min
the rate of pages per min is constant
3/13 = 9/39 = 15/65
the Question is asking for time.. So the we need the rate as min per page 13/3 so when multiplied by the number of pages it cancels to give minutes.
Units cancel out just like numbers do so you know that the problem is set up correctly.
Answer:
10x-2y
Step-by-step explanation:
distribute for both of them then multiply both answers by 2 and add them
2(x+y)= (2x+2y) x2= 4x+4y
3(x-y)= (3x-3y) x2= 6x-6y
4x+4y+6x-6x
10x-2y
Answer:
See below
Step-by-step explanation:
<u>Given relationship:</u>
a) r = 3, d = 4
- t = d/r = 4/3 h = 1 h 20 min
b) d = 4 miles, rate = r
- t = 4/r, domain is r and must be greater than zero
c) d = 4 miles, time = t
- r = d/t = 4/t, domain is t and it must be greater than zero
d) t = 3 h, rate = r
- d = rt = 3r, domain is r and can be anything greater than zero