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
2/3-1/3= 1/3
So Shane grew 1/3 of an inch more hair than his brother.
Answer:
$19
Step-by-step explanation:
the following equations can be determined from the question
5j + 2s = 208 equation 1
3j + 4s = 178 equation 2
where j = jeans
s = sweatshirts
simultaneous equation would be used to determine the values
Multiply equation 1 by 2
10j + 4s = 416 equation 3
subtract equation 2 from 3
7j = 238
j= $34
substitute for j in equation 1
5(34) + 2s = 208
2s = 38
s = $19
