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mina [271]
3 years ago
15

a 9 grade math class has 27 students there are twice as many girls in this class as there are boys.write a system of equation th

at could be used to model this situation.solve system of equetion using any method how many girls are in the class
Mathematics
1 answer:
Leona [35]3 years ago
4 0
If there are x boys, there are 2x girls. boys+girls=27 gives x+2x=27. Solving, 3x=27 or x=9. Since there are 2x girls, there are 2*9=19 girls.
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Alexandra [31]

Answer:

1.44

Step-by-step explanation:

You are trying to find what's the price per ounce which is the unit rate to find that out you.You first make a fraction then if it's money put it in the numerator ALWAYS and the 7 in the donomenater then make another fraction put 1 in the donomenater since you are trying to find the unit rate then you think 7 divided by what equals 1 and the answer is 7 because 7 divided by 7 equals 1 so now you know what to divide to 10.08 it's 7 so 10.08 divided by 7 equals 1.44.So the price per ounce is $1.44

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3 years ago
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7 0
3 years ago
Read 2 more answers
Multiply the numbers and simplify the answer: 3 x 1- 3/4
madam [21]
\underbrace{3\times1}_{first}-\frac{3}{4}=3-\frac{3}{4}=2\frac{1}{4}

3\times1\frac{3}{4}=3\times\frac{1\times4+3}{4}=3\times\frac{4+3}{4}=\frac{3}{1}\times\frac{7}{4}=\frac{3\times7}{4}=\frac{21}{4}=\frac{20+1}{4}=\frac{20}{4}+\frac{1}{4}\\\center\boxed{=5\frac{1}{4}}
5 0
3 years ago
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max2010maxim [7]

Answer:

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Step-by-step explanation:

7 0
2 years ago
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