Concrete is a mixture of cement, sand, and gravel. The Masons will purchase a cement, sand, and gravel mixture in a ratio of 1:2:3. How many pounds of each material are needed for 60 lb of concrete mix?

The complete statement is 16 times (5/2) equals 40.

What is a numerical expression?

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

let, 16 times 'x' equals to 40.

Therefore, 16x = 40.

x = 40/16.

x = 20/8.

x = 10/4.

x = 5/2.

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The required number would be 80 which is 24.5% equal to 19.6.

What is the percentage?

The percentage is defined as a ratio expressed as a fraction of 100.

For example, If Misha obtained a score of 67% on her exam, that corresponds to 67 out of 100. It is expressed as 67/100 in fractional form and as 67:100 in ratio form.

Let the required number would be x

To determine the required number 24.5% represents as a fraction, you can divide 24.5 by 100. This gives you 0.245.

To find out required number 19.6 is 24.5% of, you can set up the following equation:

19.6 = 0.245x

To solve for x, you can divide both sides of the equation by 0.245:

x = 19.6 / 0.245

x = 80

Therefore, 19.6 is 24.5% of 80.

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Answer: 12 coins

Step-by-step explanation:When you add up all the coins you get 80. 15% of 80 is 12.

Answer:

A

Step-by-step explanation: