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3 years ago

15

The first side of a triangle measures 4 in. less than the second side, the third side is 3 in. more than the first side, and the

perimeter is 15 in. How long is the third side?

1 answer:

vodomira [7]3 years ago

7 0

If the first one is 4 and the third one is three more that makes it 4+3=7 but i feel like u want the second side and that would be 4 i think

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9x^2-25<br> Yea, it confused me too I need this explained to me pls and thank you.<br>

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Answer:

What this is is factoring and these are both perfect squares.

(3x-5)(3x+5) is the answer.

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First we take the 9x^2-25 and split in in two statements

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3 years ago

9. Kelly rode her bike 3 miles less than twice the number of miles Jon rode. Together

prohojiy [21]

Answer:

Jon rode <u>17 miles</u> and Kelly rode <u>31 miles</u>.

Step-by-step explanation:

Given:

Kelly rode her bike 3 miles less than twice the number of miles Jon rode.

Together they rode 48 miles.

Now, to find the miles they each ride.

<em>Let the number of miles Jon rode be </em> $x.$ <em />

<em>So, the number of miles Kelly rode is</em> $2x-3.$

Together they rode = 48 miles.

Now, to get the miles they each rode:

According to question:

$x+(2x+3)=48$

$x+2x-3=48$

$3x-3=48$

<em>Adding both sides by 3 we get:</em>

$3x=51$

<em>Dividing both sides by 3 we get:</em>

$x=17.$

<em>Jon rode = 17 miles.</em>

So, to get the miles Kelly rode we substitute the value of $x$ :

<em>And Kelly rode = </em> $2x+3$ <em />

$=2\times 17-3$

$=34-3$

$=31\ miles.$

Therefore, Jon rode 17 miles and Kelly rode 31 miles.

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3 years ago