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sweet-ann [11.9K]
3 years ago
15

Which equation best represents the

Mathematics
1 answer:
wolverine [178]3 years ago
8 0

Answer:

y=-5x+7

<h2><u><em>Please mark brainliest!</em></u></h2>
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the equation of the line / is -3y+4x=9. write the equation of a line that is parallel to the line / and passes through the point
nekit [7.7K]

Hey!

So before trying to figure out the equation of the line, lets change -3y+4x = 9 into slope-intercept form:

-3y + 4x = 9

-3y = -4x + 9

y = (4/3)x - 3

Now that you have the equation in slope-intercept form we can find the equation of the line parallel to this. One thing that we are given from this equation is the slope of the line, the slope for two parallel lines are the same. So we know that the slope of the line is 4/3. We are also given another point on the line and we can plug this point in for y and x to find the y-intercept or b:

6 = (4/3)(-12) + b

6 = -16 + b

22 = b

Now that we know b, we have both the y-intercept and the slope so our equation would be:

y = (4/3)x + 22

4 0
3 years ago
Find all solutions to the equation.<br><br> cos^2x + 2 cos x + 1 = 0
natali 33 [55]

\bf cos^2(x)+2cos(x)+1=0\implies \stackrel{\textit{let's notice, this is simply }ax^2+bx+c=0}{[cos(x)]^2+2cos(x)+1=0} \\[2em] [cos(x)+1][cos(x)+1]=0 \\\\[-0.35em] ~\dotfill\\\\ cos(x)+1=0\implies cos(x)=-1\implies x=cos^{-1}(-1)\implies \stackrel{\textit{for the range }[0,2\pi ]}{x=\pi } \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{\textit{all solutions}}{x=\pi +2\pi n~~,~~ n \in \mathbb{Z}}~\hfill

6 0
3 years ago
Can someone help with this
mixas84 [53]

Step-by-step explanation:

-10-2x = 3x+15

5x = -25

x= -5

5 0
2 years ago
PLEASE HELP!! Write the equation of the graph.
Jet001 [13]
When you first look at thius graph, you should notice two things immedietly.

1. This graph will have a positive slope, because the line is going up.

2. the y-intercept is -2 because that's where it is on the y-axis.

Now, you have been given two points, (2, 1) and (0, -2). You can put these two points into the slope formula, which is: m = \frac{y2 - y1}{x2 - x1} \frac{(-2) - 1}{0 - 2} = \frac{3}{2} = 3/2.

So, now you have your slope and your y-intercept. Now, just put them into    y = mx + b form!

y = 3/2x - 2 (it is ubtracting two instead of adding two because it is a negative two.)

Hope this helps!!
~Kiwi
8 0
3 years ago
How to solve long division by using long division 711.9 divided by 8.4
harkovskaia [24]
Multiply both 711.9 and 8.4 by 10 which will remove the decimal point. 
and make the calculation much more easier
 the required answer would be 84.75

5 0
3 years ago
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