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3 years ago

Which of the following is a solution of 12 x - 7 > 6? -1 0 1 2

Mathematics

1 answer:

Mkey [24]3 years ago

5 0

Answer:

The answer to your question is "2"

Step-by-step explanation:

Data

12x - 7 > 6

Process

1.- Add +7 in both sides of the inequality

12x - 7 + 7 > 6 + 7

2.- Simplify

12x > 13

3.- Divide by 12 both sides

12x/12 > 13/12

x > 13/12 or x > 1.08

4.- Conclusion

All the numbers higher than 1.08 are solutions of this inequality

Then, from the choices, the only possible solution is 2.

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Solve 3x2 = −12x − 15. x = −4 ± 2i x = −4 ± i x = −2 ± 2i x = −2 ± i

diamong [38]

ANSWER

$x = - 2 \pm i$

EXPLANATION

We use the method of completing the squares.

The equation is
$3 {x}^{2} = - 12x - 15$

We rewrite the above equation to obtain;

$3 {x}^{2} + 12x = - 15$

We divide through by 3 to obtain;

${x}^{2} + 4x = - 5$

We add half the coefficient of
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${x}^{2} + 4x + {2}^{2} = - 5 + {2}^{2}$

The right hand side is now a perfect square.

${(x + 2)}^{2} = - 1$

We now take square root of both sides to get;

$x + 2 = \pm \sqrt{ - 1}$

We add -2 to both sides,

$x = - 2 \pm \sqrt{ - 1}$

We simplify to obtain,

$x = - 2 \pm i$

3 0

3 years ago

Pls help !!! For my math class!

fiasKO [112]

Answer:

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2 years ago

A line has a y intercept of 7 and a slope of 3/4, and goes DOWNHILL. What is the equation of this line?

Vladimir79 [104]

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2 years ago

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A study has shown that the daily amount of milk produced by a dairy cow is normally distributed, with a mean of 6.2 gallons and

V125BC [204]

Answer:

5.5 gallons to 6.9 gallons

Step-by-step explanation:

Daily a cow

produces a mean of 6.2 gallons (average

of 6.2 gallons, meaning they already

found the mean, "averaged" it out for

you) with a deviation of 7 gallons ("give

or take" .7 gallons). On any given day

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Just subtract the deviation ("give or

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determined)) 6.2 gallons which is 6.9

gallons. Your answer is A 5.5 gallons to

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crazy on the math on this question you

can rule them all out but A immediately

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How to find the volume of this cube

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