The answer is 42= 7(9-3), z would be 9
The correct answer for the question that is being presented above is this one: "C) 3 tons from source A, 0 tons from source B." The tons of ore from each source should be processed each day to maximize the amount of steel produced is that <span>C) 3 tons from source A, 0 tons from source B </span>
Answer:
He received 10 dimes and 15 quarters.
Step-by-step explanation:
Dimes = $0.10
Quarters = $0.25
Variable x = dimes
Variable y = quarters
Create a pair of linear equations:
0.10x + 0.25y = 4.75
x + y = 25
Isolate any variable, using an equation of your choice:
x + y = 25
x = 25 - y
Plug in this new value of x into the other equation:
0.10(25 - y) + 0.25y = 4.75
Use the distributive property:
2.5 - 0.10y + 0.25y = 4.75
Combine like terms:
2.5 + 0.15y = 4.75
Isolate variable y:
0.15y = 2.25
y = 15
Plug in the value of y into any equation:
x + y = 25
x + 15 = 25
Isolate variable x:
x = 10
Answer:
7 1/40
Step-by-step explanation:
7.025
= 7025/1000
=281/40
7 1/40