Carol has some dimes and quarters. If she has 19 coins worth a total of $3.10, how many of each type of coin does she have?

Mathematics

2 answers:

Dmitrij [34]1 year ago

7 0

Answer:

Step-by-step explanation:

Equations

Let the dimes be x

Let the quarters be y

x + y = 19 (1) Multiply this equation by 0.1

0.1x + 0.25y = 3.10 (2)

0.1x + 0.1 y = 1.90 (3) Subtract 3 from 2

0.15y = 1.20 Divide by 0.15

0.15y/0.15 = 1.20/0.15

y = 8

x + y = 19

x + 8 = 19 Subtract 8 from both sides

x+8-8 = 19-8 Combine

x = 11

Answer

Carol has 8 quarters

She has 11 dimes

Mekhanik [1.2K]1 year ago

4 0

She has 8 quarters 11 dimes

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Step-by-step explanation:

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2 years ago

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$\frac { j }{ { j }^{ 2 } } =\frac { 1 }{ j } \cdot \frac { j }{ j } =\frac { 1 }{ j } \cdot 1=\frac { 1 }{ j } \\ \\ \frac { k }{ { k }^{ 2 } } =\frac { 1 }{ k } \cdot \frac { k }{ k } =\frac { 1 }{ k } \cdot 1=\frac { 1 }{ k }$

8 0

2 years ago

Read 2 more answers

A bag of walnuts sells for$1.95 Estimate the cost of 8 bags of walnut

Alborosie

Answer:

$15.6

Step-by-step explanation:

one bag= $1.95

8 bags = 8×1.95=15.6

so answer is $15.6.

4 0