Answer:
the answer for this is option C 4x/x+5
Let x be the rate of speed of slower cyclist
and x+10 = rate of speed of faster cyclist
Distance = Speed * Time
5x + 5(x+10) = 200
5x + 5x + 50 = 200
10x = 200-50
10x = 150
x = 15
Rate of speed of slower cyclist: 15 mph
Rate of speed of faster cyclist = 15+10 => 25 mph
We have that 1 inch is 50 miles. When the problem says to use a proportion, it is telling us to make that previous equation into a conversion factor.
There is 1 inch per 50 miles, or 50 miles per 1 inch.
We write a ratio

.
We use our conversion factor and multiply across, cancelling units.
5*5 = 25
5 x 5 equals to 25 (twenty five)
Answer:
$77
Step-by-step explanation:
The answer is $77 because first you need to find how much money was discounted by doing 70-49 to get 21. Then you need to find how much percent 21 is of 70 by doing 21/70, then you would get 0.3 which is 30% since you have to multiply it by 100. This means that there is a 30% discount. Then you would do 0.3*110=33. This means that the 30% discount takes away $33. So 110-33=77. The answer is $77.