Write a numerical expression for each verbal phrase.
2 answers:
You have of one type of coin and
of another type of coin.
To find the total number of coins, you need to add the two values together.
Answer:
The correct option is C) 12 + 20.
Step-by-step explanation:
Consider the provided phrase.
The total number of coins Kyle has if he has 12 quarters and 20 dimes
Use "+" sign for and .
He has 12 quarters and 20 dimes can be written as:
The total number of coins are the sum of 2 quarters and 20 dimes
Thus, the required expression is
Hence, the correct option is C) 12 + 20.
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Answer:
The area needed to be painted is approximately 301.44 square inches.
Step-by-step explanation:
The shape of a donut is represented by two concentrical circles, whose area is described by the following formula:
(Eq. 1)
Where:
- Total area of the donut, measured in squared inches.
- Area of the greater circle, measured in square inches.
- Area of the lesser circle, measured in square inches.
By using the definition of the area of the circle, we expand the equation above:
(Eq. 1b)
If we know that ,
and
, the area needed to be painted is:
The area needed to be painted is approximately 301.44 square inches.