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2 years ago

10

How many kilograms of tin will be required to make 250 kg of an alloy, if the alloy must contain 81% copper, 14% tin and 5% lead

?

2 answers:

uysha [10]2 years ago

5 0

Answer:

35

Step-by-step explanation:

all are obeying a constant ratio

copper 81
tin 14⇒?
lead 5
total 100 ⇒250
?=250*14/100=35

Nataly_w [17]2 years ago

3 0

The answer is 35bb. good luck. by.

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Expand. Follow FOIL method. FOIL =

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Which ordered pair is a solution to the system of linear equations 1/2x-3/4y=11/60 and 2/5x+1/6y=3/10

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$( \frac{2}{3} , \frac{1}{5} )$

EXPLANATION

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The second equation is

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We want to eliminate y, so we multiply the first equation by

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$\frac{1}{6} y + \frac{3}{5}y =\frac{3}{10} - \frac{11}{75}$

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