All categories

3 years ago

I WILL MARK BRAINIEST

Mathematics

1 answer:

yan [13]3 years ago

5 0

Answer:

x=20

Step-by-step explanation:

7x+2x=180(being straight angle )

9x=180

x=180/9

x=20

You might be interested in

51/5=? In long division

valentina_108 [34]

Answer: 10.2

I hope that this helps! :3

8 0

3 years ago

Read 2 more answers

Write the equation of the line with x-intercept -2 and y-intercept -1 in slope-intercept form

eduard

The x-intercept of -2 gives us an idea that point (-2,0) if found along the line. The y-intercept of -1, tells us that point (0,-1), this also tells us that b = -1.

Now that we have two points, we can solve for slope m

$\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ \text{Given two points} \\ (-2,0)\rightarrow(x_1,y_1) \\ (0,-1)\rightarrow(x_2,y_2) \\ \\ \text{Substitute} \\ m=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{-1-0}{0-(-2)} \\ m=-\frac{1}{2} \end{gathered}$

Now that we have both m and b. Substitute these values to the slope intercept form

$\begin{gathered} \text{Slope intercept form is} \\ y=mx+b \\ \text{where} \\ m\text{ is the slope} \\ b\text{ is the y-intercept} \\ \\ \text{Substitute the values from before and we get} \\ y=-\frac{1}{2}x-1 \end{gathered}$

5 0

1 year ago

Find the slope (-1,7),(-6,1)

natta225 [31]

Answer: m = 6/5

Step-by-step explanation:

The Formula to find m is m = y2 - y1 / x2 - x1.

So for this problem I did 7 - 1 / -1 - (-6) which would equal 6/5.

7 0

3 years ago

Simplify (3n – 2m)2 = ?

Bumek [7]

If you mean (3n-2m)^2 then the answer is
9n^2-12mn+4m^2
So B

4 0

3 years ago

Hans bought 3 CDs that were each the same price. Including sales tax, he paid a total of 41.10. Of that total, 2.40 was tax. Wha

Olin [163]

Answer:

Each CD cost 12.90 before tax

Step-by-step explanation:

41.10-2.40=38.7

38.7/3=12.90

4 0

3 years ago