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3 years ago

Choose the equation of the vertical line passing through the point (−4, 2).

Mathematics

2 answers:

Degger [83]3 years ago

8 0

Vertical line has no slope. so only look at the x value. x=-4.

SashulF [63]3 years ago

6 0

Answer:

Equation would be x = - 4 .

Step-by-step explanation:

Given : vertical line passing through the point (−4, 2).

To find : Choose the equation of the vertical line .

Solution : We have given that point (−4, 2).

We know that vertical line always passes through the x axis .

Here, line passes through at x = -4 which has no slope .

Therefore , equation would be x = - 4 .

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andre [41]

Answer:

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Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of first brand of antifreeze. 20% pure antifreeze

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The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

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Then the total amount of pure antifreeze in the mixture will be:

$0.2A + 0.7B = 0.35 * 30$

$0.2A + 0.7B = 10.5$

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

$-0.7A -0.7B = -0.7*30$

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$0.2A + 0.7B = 10.5$

--------------------------------------

$-0.5A = -10.5$

$A = \frac{-10.5}{-0.5}$

$A = 21\ gallons$

We substitute the value of A into one of the two equations and solve for B.

$21 + B = 30$

$B = 9\ gallons$

3 0

3 years ago

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solniwko [45]

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4 0

3 years ago

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8_murik_8 [283]

Answer:

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Step-by-step explanation:

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6 0

2 years ago

13 x-2(8+5 x)=12-11 x

77julia77 [94]

Expand

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3 years ago

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valina [46]

Answer:

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7 0

3 years ago