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Vera_Pavlovna [14]
3 years ago
12

At a cafeteria, Mary orders two pieces of toast and a bagel, which comes out to $\$3.15$. Merry orders a bagel and a muffin, whi

ch comes out to $\$3.30$. Meery orders a piece of toast, two bagels, and three muffins, which comes out to $\$9.15$. How many cents does one bagel cost?
Mathematics
1 answer:
horsena [70]3 years ago
5 0

Answer:

A bagel costs $1.55, so that would be 155 cents

Step-by-step explanation:

Given Info:

x = cost of a piece of toast

y = cost of a bagel

z = cost of a muffin

2x + y = 3.15

y + z  = 3.30

x + 2y + 3z = 9.15

Calculations:

2x + y - (y + z ) = 3.15 - 3.30

2x - z = -0.15

-z = -0.15-2x

z = 0.15+2x

y = 3.15 - 2x

x + 2y + 3z = 9.15

x + 2(3.15 - 2x) + 3(0.15 + 2x) = 9.15

x + 6.3 -4x + 0.45 + 6x = 9.15

3x + 6.75 = 9.15

3x = 2.4

x = 0.80 cents per piece of toast

2x + y = 3.15

2(0.80) + y = 3.15

1.60 + y = 3.15

y = 1.55

So a bagel costs $1.55

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