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makkiz [27]
3 years ago
9

The sum of the measures of two supplementary angles is 90°.

Mathematics
2 answers:
kvv77 [185]3 years ago
4 0
The answer is never true
kirill [66]3 years ago
3 0
The answer to this is never true
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9 — 3x = у<br> 3х – у = -2
Phoenix [80]

Answer:

This could be wrong, but i still wanted to help you.

Step-by-step explanation:

9-3x=y

+9      +9

3x=y

÷3   ÷3

x=y/3

Im sorry if this is wrong

6 0
3 years ago
Find the value of the variable. Then find the angle measures of the polygon.
Anvisha [2.4K]
First set up the equation (sum of the angles is 180)

2x + 2(x-1) + (5x +2) = 180

distribute:
2x + 2x -2 + 5x +2 = 180

combine like terms:
9x = 180
solve for x:

x = 20

SO:

2x° = 2(20) = 40 degrees
2(x-1)° = 2(20) - 2 = 40 - 2 = 38 degrees
5x + 2°= 5(20) + 2 = 100 + 2=102 degrees

check: 40 + 38 + 102 = 180
7 0
3 years ago
Moses lived 24 years for every 35 years Abraham lived. Moses died at 120 years of age. How old was Abraham when he died?​
jenyasd209 [6]

Answer:

175 years old

Step-by-step explanation:

plz mark branliest if this helped

3 0
2 years ago
Steps for graphing -x^2-4x-3
sdas [7]

Answer:

:)

Step-by-step explanation:

There are several ways to do this. The first, which I personally think is the quickest way without having to do too much math or rearranging the equation is to simply pick random points for x and solve for y.

For instance, you might try -2 for x.

- ( - 2)^2 - 4 ( - 2) - 3

= - 4 + 8 - 3

= 1

So one of your points would be (-2, 1)

Then you might choose, say, -3 for x. And after that, -1 for x. If you want to graph even more points after those (the more points, the more accurate your graph), choose -4 and 0 for x. Simply put it into the equation and find y. Then graph.

3 0
3 years ago
During a 3-hour storm, it snow 2.5 inches. Jacob said that it snowed an average of about 8 inches per hour. What is the error?
Ad libitum [116K]
The error was the Jacob multiplied 2.5 by 3 instead of dividing. Instead it should be. 2.5 / 3 \\ &#10;.83 inches an hour
3 0
3 years ago
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