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Hatshy [7]
3 years ago
7

7. Which expression is a factor of x² + 2x – 15?

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

(x-3) is the correct expression

Step-by-step explanation:

To factor you split the expression apart -

x² + 2x – 15

This breaks up to (x+5)(x-3)

If you multiply (FOIL) these you get your expression x² + 2x – 15

Your answer choices do not include (x+5) so it must be (x-3)

<em>I hope this helps!</em>

<em></em>

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Can a triangle be formed if the side<br> lengths are 10, 23, and 10?
FinnZ [79.3K]

Answer:

No.

Step-by-step explanation:

No, because 23 > 10 + 10.

If any side is equal or greater than the sum of the other 2 sides no triangle can be drawn.

5 0
3 years ago
Read 2 more answers
I need help pleace ​
Whitepunk [10]

Answer

<em>length = width + 15</em>

<em>Area = length * width; area is 54 square feet.</em>

<em>Two equations are:</em>

<em>L = W + 15</em>

<em>L * W = 54</em>

<em>To solve, we substitute first equation into second equation:</em>

<em>(W + 15) * W = 54</em>

<em>w^2 + 15w = 54</em>

<em>w^2 + 15w - 54 = 0</em>

<em>(w+18)(w-3) = 0</em>

<em>w = -18 or 3</em>

<em>The width cannot be negative, so 3 is the width and since length is 15 more than width, length is 18:</em>

<em />

<em>Length = 18 feet</em>

<em>Width = 3 feet</em>

<em />

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7 0
3 years ago
ILL GIVE BRAINLEST, Find the value of x.
natali 33 [55]

Answer:

x=6, y=128

 

set 5x+16 = 7x+4

-2x=-12

x=6

plug x into equation= 46

180-46=134

y+6=134

y=128

3 0
3 years ago
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Show how to solve 304 take away 217
s344n2d4d5 [400]
You do 304 subtract 217 which equals 87
8 0
4 years ago
4=y-4 solve for the variable
sdas [7]
4 = y - 4
You need to add 4 on each side and you will get 8 which means that y is equal to 8.

4 = y - 4
+4 +4
8=y
6 0
3 years ago
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