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Vaselesa [24]
3 years ago
7

A $45.00 mixer sold for $47.70 with tax. What is the percent of the sales tax ?

Mathematics
1 answer:
expeople1 [14]3 years ago
6 0

Answer:

6%

Step-by-step explanation:

You can start off by subtracted $47.70 by $45.00. You will get $2.70. You then will do $2.70 divided by $45.00.

2.7 / 45 = 0.06

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At the apple pan 4 burgers and 3 fries cost 26.50. 5 burgers and 5 fries cost $36.25. what is the cost for each item?
netineya [11]
Fries are $2.50 and burgers are $4.75.

Our system of equations for this situation would be

\left \{ {{4b+3f=26.50} \atop {5b+5f=36.25}} \right.

We want the coefficients of one of the variables to be the same in order to eliminate one of them; we will make the coefficients of f the same.  To do this, multiply the top equation by 5 and the bottom equation by 3:

\left \{ {{5(4b+3f=26.50)} \atop {3(5b+5f=36.25)}} \right. 
\\
\\ \left \{ {{20b+15f=132.50} \atop {15b+15f=108.75}} \right

We subtract the bottom equation:
\left \{ {{20b+15f=132.50} \atop {-(15b+15f=108.75)}} \right. 
\\
\\ 5b = 23.75

Divide both sides by 5:
5b/5 = 23.75/5
b = 4.75

Burgers are $4.75.

Substitute this into the first equation:
4(4.75) + 3f = 26.50
19 + 3f = 26.50

Subtract 19 from both sides:
19 + 3f - 19 = 26.50 - 29
3f = 7.50

Divide both sides by 3:
3f/3 = 7.50/3
f = 2.50
8 0
3 years ago
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