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Makovka662 [10]
3 years ago
7

What is the value of b?

Mathematics
1 answer:
Natalija [7]3 years ago
8 0
b=180-90-51=39
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Determine which of the following ordered pairs satisfies the given system of equations.
alekssr [168]

Answer:

(-3,2)

Step-by-step explanation:

1) -2x+y=8

you need to leave the Y alone on one side. Then, the term -2x goes to the other side with its opposite sign which is +.

y=8+2x

2) y=2x/(5-8)

3) 8+2x=2x/(5-8)

now, you need the x value. for that, you need to leave x alone on one side.

8+2x=2x/(-3)

8+2x=-(2/3)x

8=-(2/3)x-2x

8=-(8/3)x

8/-(8/3)=x

-3=x

4) you now have the x value. you need the y value. for that, replace the x in one of the given equations. let´s use the 1st equation.

-2x+y=8

y=8+2x

y=8+2*(-3)

y=2

result:

x= -3

y=2

8 0
3 years ago
Use the graph shown to complete the following sentence.<br><br> When x = -3, then y =
DedPeter [7]

Answer: -6

Step-by-step explanation: Go to -3 on the x-axis of the graph. Find the point where the graph crosses at -3, which gets you the answer of -6.

7 0
3 years ago
Read 2 more answers
Stacia walked a total of 30,375 feet. If 2 miles is 10,560 feet, how far did Stacia walk in miles?
Margaret [11]

Answer:

62

Step-by-step explanation:

8 0
3 years ago
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Fraction (12 4/9 + 1 2/9) +3 5/9
sveticcg [70]
12 4/9 + 1 2/9=13 6/9+3 5/9=16 11/9 that answer is farther simpled 17 2/9
so the final answer is 17 2/9
6 0
4 years ago
The current temperature is 48°F. It is expected to drop 1.5°F each hour.
Lostsunrise [7]

Answer:

B

Step-by-step explanation:

5 0
2 years ago
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