Answer:
35 quarters
Step-by-step explanation:
This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.
is an equation representing the total number of coins
is an equation representing the total value in money based on the number of coin. 0.10 and 0.25 come from the value of a dime and quarter individually.
We write the first equation in terms of q by subtracting it across the equal sign to get 
. We now substitute this for d in the second equation.
After simplifying, we subtract 6 across and divide by the coefficient of q.
We now know of the 60 coins that 35 are quarters. To find the total value of the quarters, we multiply 35 by 0.25 and find 8.75.
Answer: 
<u>Add 3x to both sides</u>
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<u>Subtract 15 from both sides</u>
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<u>Divide both sides by 5</u>
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<em>Correction to your question text: diameter, not radius.</em>
The area of a circle is given by:
The radius is half of the diameter.
Substitute and solve.
<span> The distributive property is a special way where multiplication is applied to addition of two or more numbers in which each term inside a set of parentheses can be multiplied by a factor outside the parentheses, such as:
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<span>a(b + c) = ab + ac.
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Does this help in any way?
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Answer:
51
Step-by-step explanation:
Let the middle number be x. Then the 3 numbers will be, x-1, x and x+1. Therefore x-1+x+x+1=51. Therefore: 16+17+18= 51.
