Answer:

Step-by-step explanation:
we know that
The Susan's hourly wage, must be equal at least to the sum of her monthly household expenses divided by the number of hours worked at month
Remember that

She works 40 hours per week
so


<em>Find out the monthly household expenses</em>
Sum all the expenses
Rent+ Monthly Bills+Entertainment and Food+Savings
substitute the values

Find out the hourly wage

If his water to cement ratio is 20 to 30, this means that if he uses 20 liters of water, he'd use 30 liters of cement.
The total mixture would then be 20+30=50 liters.
and the water would be 20/50=0.4 or 40% of the total mixture.
Chicken - $8
Duck - $5
Work:
50c+30d=550
44c+36d=532
Area of Frame and Picture
Area = L * W
L = 9
W = 6
Area = 9*6 = 54 in²
Area of Picture
Area = L*W
L = 6
W = 4
Area = 6 * 4
Area = 24 in²
Area of Frame
Area of Frame = Total Area - Picture Area
Area of Frame = 54 - 24
Area of Frame = 30 in²
5x=25 could be one.
25/x-3=2 is another.
And the last one could be x/85+7=24