Alexandra has 36 coins valued at $6.00. She has only nickels and quarters. Which equation can be used to solve for the number of
2 answers:
Keywords:
<em>Coins, nickels, quarters, equation, variables </em>
For this case, we have 36 coins that represent 6 dollars. In addition, said coins are nickels and quarters. We must find an equation that can be used to find the number of nickels Alexandra has, of the 36 coins. For this, we must define two variables:
- n: Represents the number of nickels Alexandra has
- q: Represents the number of quarters Alexandra has
We know that:
Thus, we have the following system of equations:
We clear "q" from the equation (2):
We substitute "q" in equation (1):
Thus, the equation that can be used to find the number of nickels Alexandra has is:
Answer:
The equation that can be used to find the number of nickels Alexandra has is:
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Answer:
Orange ribbon Zoe use is
Step-by-step explanation:
Given:
Zoe had 3 1 /8 feet of orange ribbon. She used some ribbon to make a bow for a gift now she has 1 3 /8 feet of orange ribbon left.
Now, to find the orange ribbon Zoe use.
Let the orange ribbon Zoe use be
Total orange ribbon Zoe had =
Ribbon Zoe had left =
Now, to get the orange ribbon Zoe use:
<em>Subtracting both sides by </em><em> we get:</em>
<em>Adding both sides by </em><em> we get:</em>
Therefore, orange ribbon Zoe use is
Area of a semicircle = 
r² / 2
r= 5/2 = 2.5
So: A= 3.14 x 2.5² / 2 A = 9.8125 so rounding to the nearest hundredth is A=9.81
r= 5/2 = 2.5
So: A= 3.14 x 2.5² / 2 A = 9.8125 so rounding to the nearest hundredth is A=9.81