Answer:
A ) The Time at which both will earn same amount is T = 6.25 hours B ) The shorter length is 6 cm
Step-by-step explanation:
Given as :
A ) The amount earn by Marty = $24 per hour
The amount earn by Marissa = $100 weekly + $8 per hour
Let The number of hours they work to earn same amount = T hours
So, 24 T = 8 T + $100
Or, 24 T - 8 t = $100
Or, 16 T = $ 100
So, T = 
Or, T = 
∴ T = 6.25 hours
B ) Given expression as :
y = x + 2
2 x + 3y = 36
Now put the value of y from first to second eq :
So , 2 x + 3×( x + 2 ) = 36
Or, 2 x + 3 x + 6 = 36
Or, 5 x = 30 - 6
Or, 5 x = 30
∴ x =
= 6
And y = x + 2
So, y = 6 +2 = 8
So, The shorter length is 6 cm
Hence The Time at which both will earn same amount is T = 6.25 hours And The shorter length is 6 cm Answer