Answer:
It takes Jane 2 2/3 minutes
It takes Joan 5 1/3 minutes
Step-by-step explanation:
let j = time it takes Jane
let 2j = time it take Joan
j + 2j = 8
3j = 8
j = 8/3 or 2/23
2j = 16/3 or 5 1/3
Answer:
y= 1.098901x
Step-by-step explanation:
1 yard = 0.91 meter
1/0.91 = 1 meter
1.098901 = 1 meter
y = 1.098901 x
What you must do for this case is to solve the system of two equations with two unknowns.
To find the values of x and y.
We have then:
-3x + 9y = 36
4x + 12y = 24
Resolving:
Step 1:
(1/3) * (- 3x + 9y) = (36) * (1/3)
(1/4) * (4x + 12y) = 24 * (1/4)
-x + 3y = 12
x + 3y = 6
Step 2:
6y = 18
y = 18/6
y = 3
Step 3:
-x + 3y = 12
-12 + 3y = x
-12 + 3 (3) = x
x = -3
answer:
x = -3
y = 3
Divide purchase price by sale price:
50/90 = 5/9 = 0.55555
0.555 x 100 = 55.555%
Round to 55.6%