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slamgirl [31]
3 years ago
7

What is the answer to the equation x squared minus 2x equals 15.

Mathematics
1 answer:
anzhelika [568]3 years ago
7 0

Answer:

x = 5 \\ x =  - 3

Step-by-step explanation:

{x}^{2}  - 2x = 15 \\  {x}^{2}  - 2x - 15 = 0 \\  {x}^{2}   + 3x - 5x - 15 = 0 \\ x(x + 3) - 5(x + 3) = 0 \\ (x - 5)(x + 3) = 0 \\ x - 5 = 0 \:  \:  \:  \:  \: or \:  \:  \:  \: x + 3 = 0 \\ x = 5 \:  \:  \:  \: or \:  \:  \:  \:  \:  \: x =  - 3

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algol [13]

Answer:

About 7 buses.

Step-by-step explanation:

What you do is you will divide 611 by 91 to find your answer.

<em>611/91=6.714</em>

You will round up because the 7 is greater than 5.

About 7 buses.

7 0
3 years ago
Increase 250ml by 86%
Alexandra [31]
250=100%
25=10%
12.5=5%
2.5=1%
25*8=200(80%)
12.5+2.5=15(6%)
200+12=215(86%)
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so 450ml is your answer
Hope this helped :)
6 0
3 years ago
A flowerbed surrounds the base of a tree. It’s enclosed by stones to form a circle that measures 25.12 feet. What is the radius
Ymorist [56]
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5 0
3 years ago
These are lines in a plane that are always the same distance apart and never intersect. What are they? *​
Pavlova-9 [17]

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Parallel lines

Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
if a + b + c = 9 and a square + b square + c square = 35 the find the value of ab + bc + ca .​ I am in need of help
Advocard [28]

a+b+c=9 and a2+b2+c2=35 then by using identity

(a+b+c)2=a2+b2+c2+2ab+2bc+2ca,we get the answer 9x9=35+2(ab+bc+ca)

2(ab+bc+ca)=9x9-35

2(ab+bc+ca) =81-35then we get ab+bc+ca=46/2 so ab+bc+ca=23

8 0
2 years ago
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