Answer:
Total laps = 10d
Step-by-step explanation:
Let c = Carl's laps
d = Daria's laps
e = Erin's laps
c = 3d
c = e/2
c + d + e = totals laps
We can insert 3d in place of c in the third equation
3d + d + e = total laps
Also, e/2 equals 3d
e/2 = 3d
Multiply both sides by 2
(e/2 = 3d)2
e = 6d
Insert the new e
3d + d + 6d = 10d = totals laps
0.06x+0.09 (1200-x)=96
Solve for x
X=400 at 6%
1200-400=800 at 9%
Answer:
12
Step-by-step explanation:
f(-7) = 5-(-7)=5+7=12
Answer:
52 Percent participate in school sports.
Step-by-step explanation:
13/25 = x/100
Multiply 13 x 100 = 1300
Then, divide 1300 by 25 = 52
Move the decimal point two places to the left, and then you get your answer of 52%
Answer: yes
Step-by-step explanation:
