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kozerog [31]
3 years ago
5

Ahmed is taking orders for lunch. A slice of pizza cost $2.1 and a chicken sandwich costs $3.1. He collects $22.8 for the group

of 8 people. Let X = number of pizza orders. Let Y = number of chicken orders. Assuming each person orders only one item, How many people ordered a chicken sandwich?
Mathematics
1 answer:
noname [10]3 years ago
7 0
X=2
y=6

x+y=8
2.1x+3.1y=22.8

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3a² + 11a – 42<br><br>this is factoring in algebra 2 (high school) <br>​
N76 [4]

To factor,

<h2>[[[</h2>

1) First multiply coefficient of a² and constant no,

That is,

3×(-42)=-126

Since the<u> resultant no is negative</u>, you should find two such factors of 126 <u>which</u> <u>will give us the coefficient of a (=11)</u> on subracting those factors.

2) Find the factor

126=2×3×3×7

=18×7

18 and 17 are factors of 126

Also,18-7 =11.

So they are required factors for factoring,

<h2>]]]</h2>

Once you have understood above steps you can solve on your own. All you need to do is split 11 into factors ,take common terms and you will get answer.

<u>Answer:</u>

3a²+11a-42

=3a²+(18-7)a -42

=3a²+18a-7a-42

=3a(a+6) -7(a+6)

=(a+6)(3a-7)

3 0
3 years ago
Mr. Alvarez has 36 kids in his 7th period class The ratio of boys to girls is 5:7. How many boys are there? How many girls are t
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