5.25 pounds of one alloy containing 45% copper and 36.75 pounds of 69% copper is used to make 42 pounds of 66% copper
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
Let x represent the amount of 45% copper and y represent the amount of 66% copper needed to make 42 pounds of a third alloy containing 66% copper. Hence:
x + y = 42 (1)
Also:
0.45x + 0.69y = 42(0.66) (2)
This gives:
x = 5.25, y = 36.75
5.25 pounds of one alloy containing 45% copper and 36.75 pounds of 69% copper is used to make 42 pounds of 66% copper
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Answer:
8/9
Step-by-step explanation:
To get a fraction into the simplest form you need to find a common multiple that could divide into both the numerator and the denominator. Then it will decrease.
32 / 4 = 8
36 / 4 = 9
I hope this helps :D
Answer:
This comes out to 2 mph.
Step-by-step explanation:
Reduce the following fraction:
6 miles
---------------
3 hours
This comes out to 2 mph.
Answer:
90
Step-by-step explanation:
The area of the circle is 1260.25 π m^2
