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NeX [460]
3 years ago
10

One number is 2 less than a second number. Twice the second number is 17 less than 5 times the first

Mathematics
1 answer:
gulaghasi [49]3 years ago
4 0
X=y-2
2y=5x-17
Substituting for x into the second equation, we find
2y=5(y-2)-17
2y=5y-10-17
-3y=-27
y=9
So x=7
Thus, the two numbers are 7 and 9.
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3 years ago
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What’s the linear equation for (1,21)(2,33)(3,45)(4,57)
nalin [4]

The linear equation representing the above said pair of points is "y=12x+9"

Step-by-step explanation:

The given set of points are  

x Y

1 21

2 33

3 45

4 57

For finding the linear equation for the given sets of value

We must know the generic form of a linear equation is y=m*x + c

m= slope of the line where y= Δy/Δx  

Δy= change in y value

Δx= change in x value

Thus slope ”m” = 33-21/2-1 = 12

we put slope “m” in the equation which becomes y=12x+c

Now we put any of the set value in the equation

33= 12*2+c ∴ c=9

Hence required linear equation is y=12x+9

7 0
2 years ago
2x-y=-2 <br><br> -x-2y=4 <br><br> estimate the coordinates
ValentinkaMS [17]
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2 years ago
Need help on some math "pictures "
vekshin1
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