It has infinite solution or many solutions.
The steps are on paper.
Answer:
4.5m is 450%
90cm is 45%
Step-by-step explanation:
Answer:
Step-by-step explanation:
A.)
Let the equal number of hours be represented by variable h;
The two equations will be as follows;
Jack; 40 +30h
Mark; 50 +25h
Next, equate them;
40 + 30h= 50 + 25h
30h - 25h = 50 - 40
5h = 10
h =10/5
h = 2
Therefore, they charge the same amount at 2 hrs.
B.) The amount charged;
Replace the variable H in any of the two equations above with 2 to solve for the amount.
Equation 40+30h = 40 + (30*2)
=40 + 60
= $100
Since Ellen drove a total of 80 miles, and for 2 hours.
Her speed is = 80/2 = 40 miles/hour
So Ellen drove for 40 miles/hour.
Since Carin drove 5 miles per hour faster than Ellen, the he drove = (40 + 5) = 45 miles/hour.
So Ellen drove 40 miles/hour and Carin drove 45 miles/hour
