'nine less than three times a number is negative twenty-one.'
Answer:
Step-by-step explanation:
Answer:
Number of dimes = 3
Number of nickels = 7
Number of quarters = 5
Step-by-step explanation:
Let x be the number of dimes in the jar.
The amount of nickels is one more than twice the number of dimes, then the amount of nickels is 
The number of quarters is one half the total number of nickels and dimes, so the number of quarters is 
Fill in the table

Thus, the total sum in cents is

The total amount of money in the jar is $1.90 that is 190 cents. So,
![57.5x+17.5=190\\ \\575x+175=1,900\ [\text{Multiplied by 10}]\\ \\575x=1,900-175\\ \\575x=1,725\\ \\x=3](https://tex.z-dn.net/?f=57.5x%2B17.5%3D190%5C%5C%20%5C%5C575x%2B175%3D1%2C900%5C%20%5B%5Ctext%7BMultiplied%20by%2010%7D%5D%5C%5C%20%5C%5C575x%3D1%2C900-175%5C%5C%20%5C%5C575x%3D1%2C725%5C%5C%20%5C%5Cx%3D3)
Number of dimes = 3
Number of nickels = 7
Number of quarters = 5
Check the total amount of money in the jar:

Answer:
The percentage decrease is 29%
Step-by-step explanation:
Given


Required
Determine the percentage decrease
This is calculated as thus:

Substitute values for Final and Initial


<em>Get absolute value of -87</em>




Hence, the percentage decrease is 29%