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Vera_Pavlovna [14]
3 years ago
5

(-3x - 7) + (4x + 7)

Mathematics
1 answer:
Paha777 [63]3 years ago
8 0

Answer:  Just Simplify and add like terms

-3x - 7 + 4x +7

1x -7 +7

1x = 0

1x

x

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Find x and y. Please
asambeis [7]

Answer:

x = 4       y = 21

Step-by-step explanation:

16x - 23 = 10x + 1

16x - 10x = 23 + 1

6x = 24

24/6 = x

x = 4

16(4) - 23 = 41

41 + (180 - 62) + y = 180

41 + 118 + y = 180

y = 21

4 0
2 years ago
Find the solutions of the quadratic equation 3x^2-5x+1=0.
Black_prince [1.1K]

Answer:

The solutions of the quadratic equation are x_{1} = \frac{5 + \sqrt{13}}{6}, x_{2} = \frac{5 - \sqrt{13}}{6}

Step-by-step explanation:

This is a second order polynomial, and we can find it's roots by the Bhaskara formula.

Explanation of the bhaskara formula:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = (x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}

\bigtriangleup = b^{2} - 4ac

For this problem, we have to find x_{1} \text{and} x_{2}.

The polynomial is 3x^{2} - 5x +1, so a = 3, b = -5, c = 1.

Solution

\bigtriangleup = b^{2} - 4ac = (-5)^{2} - 4*3*1 = 25 - 12 = 13

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a} = \frac{-(-5) + \sqrt{13}}{2*3} = \frac{5 + \sqrt{13}}{6}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a} = \frac{-(-5) - \sqrt{13}}{2*3} = \frac{5 - \sqrt{13}}{6}

The solutions of the quadratic equation are x_{1} = \frac{5 + \sqrt{13}}{6}, x_{2} = \frac{5 - \sqrt{13}}{6}

3 0
3 years ago
If the measure of an angle is twenty less than the measure of its complement, what is the measure of the angle?
velikii [3]
That angle would be 35 degrees. 

Complementary angles equal 90 degrees. So you can create an equation with x as the angle and its complement being x + 20. Set that equal to 90 and solve. 
5 0
3 years ago
Math. help. please. help. math homework sucks.
slamgirl [31]
21.c

22.d

23.a

24.c
25.b
8 0
3 years ago
Read 2 more answers
3(4x + 2) +2(x-1) please help me with this equation
notsponge [240]

Answer:

14x + 4

Step-by-step explanation:

3(4x+2) + 2(x-1)

Distribute by multiplying into the bracket

=12x + 6 + 2x - 2

Group like terms by adding and subtracting

= 14x + 4

3 0
3 years ago
Read 2 more answers
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