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zmey [24]
3 years ago
8

2(y - 2) = 20" alt="5y( y + 3) - 2(y - 2) = 20" align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
5 0

Answer:

Step-by-step explanation:

5y^2+15y-2y+4=20

5y^2-13y+4=20

5y^2-13y+4-20=0

5y^2-13y-16=0

This equation is in standard form: ax^2+bx+c=0. Substitute 5 for a, 13 for b, and −16 for c in the quadratic formula.

Alecsey [184]3 years ago
4 0

Answer:

y =  \frac{ - 13 -  \sqrt{489} }{10}

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Help!!!
Artyom0805 [142]

Answer:

  C:  y+7=2/5(x+4)

Step-by-step explanation:

The point-slope form of the equation of a line with slope m through point (h, k) is ...

  y -k = m(x -h)

You are given m=2/5 and (h, k) = (-4, -7). Put these numbers into the form and simplify the signs:

  y -(-7) = 2/5(x -(-4)) . . . . . numbers put into the form

  y +7 = 2/5(x +4) . . . . . . . signs simplified . . . . matches choice C

5 0
3 years ago
I really need help on this please help
Delvig [45]
I believe the X numbers are divided by 2, to get the Y numbers. So the blank X box is 1 and the other is 12.


8 0
3 years ago
M and n are parallel lines cut by a transversal.<br> What is the value of x + y?
slava [35]

Answer:

180°

Step-by-step explanation:

It will be answer ...............

8 0
3 years ago
Please help... need help ASAP due today... which ones are the answers?
andrey2020 [161]

Answer:

Choices 1 and 4 are correct.

Step-by-step explanation:

We first need to find what the slope of the line is. That way, we can find out which possible answers are perpendicular to it:

\frac{4-(-2)}{3-1}=\frac{6}{2}=3

Since we now have the slope, we need the negative reciprocal of it. Remember: if x is the slope, it's negative reciprocal will be -\frac{1}{x}. Therefore, if the line's slope is 3, then we need to find answers with a slope of-\frac{1}{3}.

The first answer is correct, as you have marked. The second answer, while written a little weirdly, does show the slope as 3, which we know as wrong. The third choice is not correct, however. This equation is written in point-slope form, wherey-y_{1}=m(x-x_{1}). The only variable we have to worry about is m, which, in the third choice, is 3. The fourth answer is correct, which sounds weird at first. Let's put that equation into slope-intercept form:

x+3y=9\\3y=9-x\\y=3-\frac{1}{3}x\\y=-\frac{1}{3}x+3

Equations like these can be real sneaky, so it's important not to jump to conclusions with them.

6 0
3 years ago
Find the solution to this equation 2(x + 12) - 2x = 3(x - 2)
Wewaii [24]

Answer:

it equals x=10 so i guess it's B

Step-by-step explanation:

6 0
3 years ago
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