Donna bought a candy bar for $1.50. She paid with nickels and dimes.
She used 21 coins in all. How many
nickels (n) and how many dimes (d)
did she use?

12 Nickels & 9 Dimes

Step-by-step explanation:

Systems of Equations

0.05x + 0.10y = 1.50

x + y = 21

Find the intercept and you get (12,9)

60

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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