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Alecsey [184]
1 year ago
12

What's is this x+2y-6 and y=3x-7

Mathematics
1 answer:
krok68 [10]1 year ago
6 0
Put y in the x+2y-6. x+2(3x-7)=0. So x+6x-14=0. 7x-14=0. 7x=14. x=2
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it takes 47 minutes for 7 people to paint 7 walls. how many minutes does it take 20 people to paint 20 walls?
4vir4ik [10]

Answer:

7 people, 7 walls, 48 minutes

 

Each person paints 1 wall in 48 minutes

 

20 persons, 20 walls


Each person can paint 1 wall in 48 minutes so it will  take 48 minutes.



6 0
2 years ago
A line passes through 2, -1 and 4, 5 what is the equation
SVEN [57.7K]

y1 - y2 / x1 - x2

-1 - 5 / 2 - 4

-6/-2

3

y = mx + b

-1 = 3(2) + b

-1 = 6 + b

-7 = b

y = 3x - 7

Hope this helps! ;)

8 0
3 years ago
Read 2 more answers
Totsaken sold half of his comic books and bought ten more. He now has 40. With how many did he begin?
AURORKA [14]
The answer is 60 because

40-10*2=60

hope it helps
8 0
2 years ago
Read 2 more answers
If the radius of a circle is 3 meters, how long is the arc subtended by an angle measuring 30°?
FromTheMoon [43]
Circumference of entire circle = 2 * PI * radius
2 * PI * 3 = <span> <span> <span> 18.8</span></span></span>5 meters
a 30 degree arc is (30/360) or 1/12 of a circle.
So the arc equals (18.85 meters / 12) or <span> <span> <span> 1.57</span></span></span> meters.


3 0
3 years ago
15 more than three times a number is equal to 75<br> Also please do a step by step
Vlad [161]

Answer:

Step-by-step explanation:

3n+15=75

three times a number is 3n. +15 is 15 more.

3n+15=75  subtract 15 from both sides to get the 3n alone

3n=60 divide by 3 to get the n by itself

n=20

4 0
2 years ago
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