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IRINA_888 [86]
3 years ago
9

I need help on #3!!!

Mathematics
2 answers:
blagie [28]3 years ago
6 0

Answer:

all work is pictured and shown

Veseljchak [2.6K]3 years ago
5 0

Answer:

\frac{{x}^{2} - 9}{{x}^{2} - 16}

Step-by-step explanation:

[\frac{(x - 3)(2x + 1)}{(x - 4)(x + 5)}][\frac{(x + 3)(x + 5)}{(x + 4)(2x + 1)}] =  \frac{(x - 3)(x + 3)}{(x - 4)(x + 4)} =  \frac{{x}^{2} - 9}{{x}^{2} - 16}

In order to figure this out, you have to factor every single trinomial in the denominators and numerators. By doing this, you will arrive at your answer alot swifter.

I am joyous to assist you anytime.

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Step-by-step explanation:

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When you are substituting equations, all you are doing is plugging in variables. Lets do an example..something random but easy...
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3 years ago
How many solutions does this equation have?
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The ratio of the number of boys to the number of girls at Liam's school is 4:5. There are 270 students at his school. Statement
Aleks04 [339]

Answer:

"statement 1: The number of boys at the school is \frac{4}5 of the number of girls." is true.

Step-by-step explanation:

Given:

Ratio of Number of boys to the number of girls = 4 : 5

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To find:

Number of boys in terms of number of girls = ?

Solution:

As per given statement,

Let, Number of boys = 4x

Let, Number of girls = 5x

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As per Statement 1:

Finding \frac{4}5 of the number of girls:

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Number of boys is equal to \frac{4}9 of total number of students.

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Step-by-step explanation:

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