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1 year ago

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A loaf of bread has 16 slices, Then two pieces were made into toast. The rest were made into sandwiches that use 2 slices of bre

ad each. How many sandwiches were made from the loaf?
Show your work?

1 answer:

ruslelena [56]1 year ago

6 0

1) 16-2=14 2) 14/2=7 3) 7 Sandwiches were made

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<em><u>Solution:</u></em>

Let "d" be the number of dimes

Let "q" be the number of quarters

We know that,

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value of 1 quarter = $ 0.25

<em><u>Given that There are 128 coins in all</u></em>

number of dimes + number of quarters = 128

d + q = 128 ------ eqn 1

<em><u>Also given that collection of dimes and quarters is worth $19.85</u></em>

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$d \times 0.10 + q \times 0.25 = 19.85$

0.1d + 0.25q = 19.85 -------- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

From eqn 1,

d = 128 - q -------- eqn 3

<em><u>Substitute eqn 3 in eqn 2</u></em>

0.1(128 - q) + 0.25q = 19.85

12.8 - 0.1q + 0.25q = 19.85

12.8 + 0.15q = 19.85

0.15q = 7.05

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<h3>d = 81</h3>

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