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4 years ago

I just don't get this in general

Mathematics

2 answers:

Elanso [62]4 years ago

7 0

I hope this helps you

in 30-60-90 triangle

30 => k=HJ

60=> k square root of 3=HI

90=> 2k=JI

2k=12 square root of 23

HJ=k=6 square root of 23

HI=k square root of 3=6 square root of 69

m (J)=60

svp [43]4 years ago

4 0

Mj will be 60 dagree for the others use the hypatos formula

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Find the equation of a line, in slope-intercept form of a line that passes through the point (-5, -1) and is parallel to -2x+4y=

Lana71 [14]

Answer:

$y=\frac{1}{2}x+\frac{3}{2}$

Step-by-step explanation:

Let's write $-2x+4y=8$ to slope-intercept form.

We do this by solving for $y$

$-2x+4y=8\\$

Add 2x to both sides

$4y=8+2x$

Divide both sides by 4

$y=\frac{1}{2} x+2$

Now that we have that equation in slope-intercept form, the question wants us to find a line that is parallel to it that passes the point (-5, -1).

A line is parallel to another line is they have the same exact slope.

The slope is $\frac{1}{2}$ .

Slope-intercept form: $y=mx+b$ , where $m$ is the slope and $b$ is the y-intercept.

So, let's see what we have here so far.

$y=\frac{1}{2}x +b$

All we have to do is find $b$ .

The question wants the line to pass the point (-5, -1).

Let's plug that point in.

$-1=\frac{1}{2} (-5)+b\\-1=\frac{-5}{2}+b\\\frac{3}{2} =b\\$

We have all the information needed to finish this problem!

So, the line that is parallel to $-2x+4y=8$ and passes through the point (-5, -1).

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3 0

3 years ago

Please help me solve for x

Elena-2011 [213]

Answer:

$x=49^o$

Step-by-step explanation:

We know that we are dealing with parallel lines, as there are double headed arrows on each of the lines, pointing in the same direction.

This means we can use corresponding / alternate angle laws.

We know that the angles on a straight line add up to $180^0$ , so we can solve for the angle just above the $131^o$ to try and see if that will help us.