The sum of 4 thirteens and 16 thirteens, need answer ASAP :(

Mathematics

1 answer:

Elodia [21]2 years ago

4 0

Answer:

260?

Step-by-step explanation:

I used the equation (4)13+(16)13 and plugged it into my calculator and got 260.

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What is the focus of the parabola? y=−14x2−2x−2

nataly862011 [7]

First, we need to transform the equation into its standard form (x - h)²=4p(y - k).
Using completing the square method:

y = -14x² - 2x - 2
y = -14(x² + 2x/14) - 2
y = -14(x² + 2x/14 + (2/28)²) -2 + (2/28)²
y = -14(x + 1/14)² - 391/196
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This is a vertical parabola and its focus (h, k + p) is (-1/14, -391/196 + 1/56) = (-1/14, -775/392).

Or (-0.071,-1.977).

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Answer:

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The diameter of a sphere is 8 centimeters. What is the volume of the sphere? Use 3.14 for pi. Enter your answer, as a decimal, i

Angelina_Jolie [31]

The volume of a sphere is given by the equation $V= \frac{4}{3} \pi r^3$ , where r is the radius.

We are given the diameter of the sphere, but recall that the diameter is twice the radius: $d=2r$ . So the radius is half of the diameter: $r= \frac{1}{2}d$ .

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We substitute this for r in the equation and we use 3.14 for π.

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yaroslaw [1]

Answer:

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Step-by-step explanation:

Given:

number of children is c

number of teachers is t

$\frac{c}{t}$ = $\frac{14}{3}$ (rearrange)