9(9n-5)
9=0 9n-5=0
9n=5
9/5 is the answer and 0 or 9(9n-5)
First, let's define the variables d and q as follows:
d: total number of dimes
q: total number of quarters.
"Joan has an equal number of dimes and quarters" means that d=q.
"...with <span>with a total value of $1.40</span>" means that
0.1 d + 0.25 q =1.40. ***
This is because Joan has a total of d dimes each with a value of 0.1$, and a total of q quarters, each with a value of 0.25.
Since d=q, we can write the equation *** as:
0.1 q +0.25 q=1.40
0.35 q=1.40
q=1.40/0.35 = 4.
Thus, Joan has a total of 4 quarters, and 4 dimes.
Answer: 8 coins.
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Explanation:</h2><h2>
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If we have two variables and can write a relationship between them as:
Then we say that 
varies directly as 
or is directly proportional to
In this case, let's say:
Then since we know that the fee for 5 hours of work is $255, then the constant of proportionality is:
Therefore, our model can be written as:
Answer:
x = 4
Step-by-step explanation:
