Write an equation for a line with a slope of 2, through (4,-2) in standard form.

Mathematics

1 answer:

Nana76 [90]2 years ago

8 0

Answer:

The correct answer would be -2x + y = -10

Step-by-step explanation:

To do this, start with point-slope form and input the known values.

y - y1 = m(x - x1)

y + 2 = 2(x - 4)

Now distribute and solve for the constant.

y + 2 = 2(x - 4)

y + 2 = 2x - 8

-2x + y + 2 = -8

-2x + y = -10

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Unit digit=y
tens digit=x
the number: 10x+y

We suggest this system of equations:
x+y=7
(10y+x)=(10x+y)+9
we solve it by substitution method.
x=7-y
10y+(7-y)=(10(7-y)+y)+9
9y+7=70-10y+y+9
9y+10y-y=70+9-7
18y=72
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x=7-y
x=7-4=3

number=10x+y=10*3+4=30+4=34

solution: the number: 34

To check:
3+4=7
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