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EastWind [94]
3 years ago
7

I need answers quick plz, (about angles)

Mathematics
1 answer:
mihalych1998 [28]3 years ago
4 0

Answer:

D

Step-by-step explanation:

Well there's a theorem about the sum of the interior angles of a triangle that says that the sum is equal to 180°

so we have

(50)+(2x)+(3x-10)=180\\\\50+2x+3x-10=180\\\\(2x+3x)+(50-10)=180\\\\5x+40=180\\\\5x=180-40\\\\5x=140\\\\x=28

so it's option D

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18-22 evens please and show how to do the work
marta [7]
#18
Answer C
4*7 = 28 which is the most closest one to 27.8

#19
perimeter = 2(L+W)
175.33 feet = 2103. 96 in
2 ( 2103.96 +48)
2 * 2151.96
4303.92 inches

#20
L*W = A
2103.96 * 48
100990.08 inch^2

to lazy to do the rest sorry
5 0
3 years ago
Plz help me due today
GREYUIT [131]

Answer:

the suare root of nine is rational (bc its 3) the other two are not

Step-by-step explanation:

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3 0
3 years ago
A pair of equations is shown below:
horrorfan [7]

Answer:

A. x=2, y = 7.

B. (2, 7).

Step-by-step explanation:

A. You can eliminate y by subtracting the equations:

y =  8x - 9

y =  4x - 1       Subtract:

0 =  4x - 8

4x = 8

x = 8/4 = 2.

Now substitute for x in the first equation:

y = 8(2) - 9 = 7.

Check in the second equation:

y = 4x - 1

7 = 4(2) - 1 = 7.  Check is OK.

B. On the graph they will intersect at the point (2, 7).

They will intersect here because the values x=2 and y=7 satisfy both the 2 equations.

4 0
3 years ago
What is y=-2/3 x + 4 in standard form?
maxonik [38]

Answer:

2x + 3y = 12

Step-by-step explanation:

Standard form is Ax + By = C, A, B and C must be intergers, cannot be  fractions or decimals

y = -2/3x + 4 First we want to get rid of  the fractions.  There is only one, so if we multiply both sides by 3 that should do it.

3y = -2x + 12 Now make the constant be on one side by itself

2x + 3y = 12

5 0
3 years ago
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Explain how you would show 135% on a 10-by10 grid
dangina [55]
You would shade in 135 of the squares in the grid(s)
8 0
4 years ago
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