Achange jar contains nickels, dimes and quarters. the total amount of money in the jar is $1.90. the amount of nickels is one more than twice the number of dimes. the number of quarters is one half the total number of nickels and dimes. find the number of each coin in the change jar.

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,

Number of dimes = 3

Number of nickels = 7

Number of quarters = 5

Check the total amount of money in the jar:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11