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3 years ago

If a + 2b + 6c = -9 what is 12c + 2a + 4b

Mathematics

1 answer:

katrin [286]3 years ago

3 0

Answer:

-18

Step-by-step explanation:

Multiply the given equation by 2.

2(a +2b +6c) = 2(-9)

12c +2a +4b = -18

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2.48030477 rounded to the nearest hundred-thousandth is

ValentinkaMS [17]

<span>2.48030, its rounded tenths 2.5 hundreths 2.48 thousands 2.480 ten-thousands 2.4803 then </span>hundred-thousandth 2.48030

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2 years ago

What is the distance between 4.4 and -2.2 on a number line?

SSSSS [86.1K]

Answer:

2.2

Step-by-step explanation:

4.4 + -2.2 = 2.2

....................................................................

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3 years ago

Find an equation of the circle that has center (-4,3) and passes through (6,-4).

kumpel [21]

Answer:

$(x+4)^2+(y-3)^2=149$

Step-by-step explanation:

The equation of a circle is $(x-h)^2+(y-k)^2=r^2$ where $(h,k)$ is the center of the circle and $r$ is the radius of the circle.

Given that $(h,k)\rightarrow(-4,3)$ and it passes $(6,-4)$ , their distance between each other must the radius of the circle, so we can use the distance formula to find the radius:

$d=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}\\\\d=\sqrt{(-4-3)^2+(6-(-4))^2}\\\\d=\sqrt{(-7)^2+10^2}\\\\d=\sqrt{49+100}\\\\d=\sqrt{149}$

Therefore, if the length of the radius is $r=\sqrt{149}$ units, then $r^2=149$ , making the final equation of the circle $(x+4)^2+(y-3)^2=149$

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2 years ago

430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the prop

Ray Of Light [21]

The estimated portion of light bulbs that last more than 500 hours will be
x=∑xn=224/430=0.521=52.1%

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2 years ago

Explain how you got 43+58+62+57+42=262

aev [14]

Answer:

If you take All of them and add them then you get 262 I dont really understand what your trying to say

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2 years ago