Mathematics: While mining, John found a large metal bar that contained 15 pounds of zinc. John also determined that the bar was 60% zinc. What was the total weight of the metal bar in pounds? Round your answer to the nearest whole number if necessary.

While mining, John found a large metal bar that

Ответ:

purplefive85

25.01.2022

Mathematics

The total weight of the metal bar in pounds is 25 pounds

Step-by-step explanation:

Now, we have a metal bar which has a content of 60% zinc corresponding to 15 pounds.

Mathematically, let’s say the total weight of the metal composite is x pounds. It is 60% of this that is 15 pounds which is the content of the zinc

Mathematically;

60/100 * x = 15

60x = 15 * 100

60x = 1500

x = 1500/60

x = 25 pounds

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Ответ:

miami158999

06.06.2022

Mathematics

$\large\boxed{x=\dfrac{233}{3}=77\dfrac{2}{3}}$

Step-by-step explanation:

$3x-4y=65\\\\\text{Put}\ y=42\ \text{to the equation and solve for }\ x:\\\\3x-4(42)=65\\\\3x-168=65\qquad\text{add 168 to both sides}\\\\3x-168+168=65+168\\\\3x=233\qquad\text{divide both sides by 3}\\\\\dfrac{3x}{3}=\dfrac{233}{3}\\\\x=\dfrac{233}{3}$

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While mining, John found a large metal bar that contained 15 pounds of zinc. John also determined that the bar was 60% zinc. What was the total weight of the metal bar in pounds? Round your answer to the nearest whole number if necessary.

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