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just olya [345]
3 years ago
8

A pencil at a stationery store costs $1, and a pen costs $1.50. Stefan spent $7 at the store. He bought a total of 6 items. Whic

h system of equations can be used to
find the number of pencils (x) and pens (/) he bought?
Ox+ 1.5y = 7
X + y = 6
O 1.5x + y = 7
x=6y
Ox + 2y = 7
6x = 1.5y
O 2x + y = 7
6x = 1.5y
Mathematics
2 answers:
Andrej [43]3 years ago
8 0

Answer: A

Step-by-step explanation:

Because he bought 6 items, x + y = 6.  Because a pencil costs 1 dollar and a pen costs 1.5 dollars, and Stefan spent 7 dollars, 1x+1.5y=7.

<em>Hope it helps <3</em>

Bezzdna [24]3 years ago
6 0

Answer:

The first equation is correct

Step-by-step explanation:

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Solve 2x + 5y = –13. 3x – 4y = –8
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If you would like to solve 2x + 5y = - 13 and 3x - 4y = -8, you can do this using the following steps:

<span>2x + 5y = -13  /*4
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</span>_________________
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Jobisdone [24]

Answer:

16 is the number of quarters and 14 is the number of dimes

Step-by-step explanation:

we know that

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Let

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we know that

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y=30-x -----> equation B

Substitute equation B in equation A

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