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AysviL [449]
3 years ago
5

15 points please help

Mathematics
1 answer:
Molodets [167]3 years ago
7 0
The answer is x= -21

3x-3=6(x-10)
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Which of the following are solutions to the equation below?
Natasha2012 [34]
Both A and C would be solutions to the equation.

In order to solve for this you must first get the equation equal to 0. 

2x^2+5x+8=6 ----> subtract 6 from both sides
2x^2 + 5x + 2 = 0

Now knowing this we can use the coefficients of each one in descending order of power as a, b and c. 

a = 2 (because it is the coefficient to x^2)
b = 5 (because it is the coefficient to x)
c = 2 (because it is the end number)

Now we can plug these values into the quadratic equation. 

\frac{-b +/- \sqrt{b^{2} - 4ac } }{2a}

\frac{-5 +/- \sqrt{5^{2} - 4(2)(2) } }{2(2)}

\frac{-5 +/- \sqrt{9} }{4}

\frac{-5 +/- 3 }{4}

\frac{-5 + 3 }{4} or -1/2 for the first answer

\frac{-5 - 3 }{4} or -2 for the second answer

5 0
3 years ago
What is the slope of this line?<br><br> A. 1/3<br> B. 1/2<br> C. 1<br> D. 2
HACTEHA [7]

Slope = rise / run

so answer is

C. 1

6 0
3 years ago
Read 2 more answers
What is the answer to 6(y+2)-4=-10
Brilliant_brown [7]
6(y+2)-4=-10\\ \\6y+12-4=-10\\\\6y=-10-12+4\\\\6y=-18\ \ / :6\\ \\y=-3


5 0
3 years ago
Read 2 more answers
Which is the better buy? 5 oranges for $1.60 or 7 oranges for $2.45
Digiron [165]
I think 7 oranges for $2.45 are better.
8 0
3 years ago
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Write repeating decimal 0.027272727 ... as a fraction.
Andrews [41]

Answer:

3/110

Step-by-step explanation:

x = .0272727 repeating

Multiply by 100

100x = 2.727 repeating

Subtract the first equation from the second

100x = 2.727 repeating

-x = .0272727 repeating

------------------------------------

99x = 2.7

Divide each side by 99

99x/99 = 2.7/99

x = 27/990

x =3/110

4 0
2 years ago
Read 2 more answers
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