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Ksivusya [100]
3 years ago
5

-6(x+7)=-4x-2 How many solutions does it have

Mathematics
1 answer:
geniusboy [140]3 years ago
6 0

Answer:

Equation have Unique solution i.e x=-20

Step-by-step explanation:

Given Equation:

-6(x+7)=-4x-2

Solving the Equation for 'x'.

           -6(x)-6(7)=-4x-2\\\\-6x-42=-4x-2

Adding '4x'  both sides:

             -6x+4x-42=-4x+4x-2\\\\-6x+4x-42=-2\\\\-2x-42=-2

Adding '42' both sides:

               -2x-42+42=-2+42\\\\-2x=40

                        x=\frac{40}{-2} \\\\x=-20

The equation have Unique solution with the value of x=-20

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Answer:

The correct option is D.

Step-by-step explanation:

The slope of a line is the change in y with respect to x.

m=\frac{y_2-y_1}{x_2-x_1}

If the slope of a line is undefined it means it is a vertical line and a vertical line  can not passes through three quadrants. So, option A is incorrect.

If the slope of a line is 0 it means it is a horizontal line and a horizontal line  can not passes through three quadrants. So, option B is incorrect.

If the slope of a line is positive it means the value of y increases as x increases.

Since it is an increasing line, therefore after a certain period both x and y will positive. It means the line will passes through first quadrant. So, option C is incorrect.

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Therefore the correct option is D.

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3 years ago
Ms.Lopez has 4 liters of chemicals that she is going to pour into beakers. Each beaker will have 1/4 of a liter of chemicals, ho
Yakvenalex [24]
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6 0
3 years ago
What is 3 ^9? how to solve?
Tanya [424]
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What I would do it is narrow it down piece by piece. 

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That leaves you with:

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Read 2 more answers
If BC = 5 and CD = 26, find AC.
Blababa [14]

Answer:

AC=\sqrt{130}

Step-by-step explanation:

AC is the geometric mean.  Solve it using this proportion:

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Cross multiply to get

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That means that

AC = \sqrt{130}, which, in decimal form is

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3 0
3 years ago
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