2 years ago

Finding circumference.

Mathematics

2 answers:

Vsevolod [243]2 years ago

6 0

50.24. I used the formula for area of a circle and that’s what I got.

Assoli18 [71]2 years ago

3 0

Answer:

50.27

Step-by-step explanation:

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You deposit $900

kakasveta [241]

Answer:40 years

Step-by-step explanation:

First you get 1% which is 9$ then you times it by 5 and get 45 multiply it by 20 you get 900 but since you want to double it then double the answer which is 40

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2 years ago

A hiker descends from a mountain peak. If the hiker descends at a rate of 700 feet every half hour, what is the hiker's elevatio

geniusboy [140]

Answer:

-4,200 feet

Step-by-step explanation:

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2 years ago

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WHAT VAULE MAKES THE TRIANGLE SIMILAR A.1.5 <br> B.5 c .6 d .9

alukav5142 [94]

C.6 is your answer. half of 4 is 2, and your smaller triangle is 2 and 3, half of 6 is 3.

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2 years ago

work it out "the equation 1.5r + 15=2.25r represents the number r of movies u must rent to spend the same amount at each movie s

Alex17521 [72]

Answer:

Step-by-step explanation:

Your equation is correct. To solve it subtract 1.5r from both sides and divide by the resulting coefficient of r.

15 = 0.75r

15/0.75 = r = 20

You must rent 20 movies for the costs to be the same.

4 0

2 years ago

Given that the quadratic equation has equal roots (k^2-1)x^2-2kx-3k-1=0

Alik [6]

Answer:

(See explanation for further details)

Step-by-step explanation:

The real expression is:

$(k^{2}-1)\cdot x{{2} - 2\cdot k \cdot x - 3\cdot k + 1 = 0$

The general equation for the second-order polynomial is:

$x = \frac{2\cdot k \pm \sqrt{4\cdot k^{2}-4\cdot (k^{2}-1)\cdot (-3\cdot k + 1)}}{k^{2}-1}$

This condition must be observed for the case of a quadratic equation with equal roots:

$4\cdot k^{2} - 4\cdot (k^{2}-1)\cdot (-3\cdot k + 1) = 0$

$k^{2} + (k^{2}-1)\cdot (3\cdot k + 1) = 0$

$k^{2} + 3\cdot k^{3} - 3\cdot k - k^{2}-1 = 0$

$3\cdot k^{3} - 3\cdot k - 1 = 0$

7 0

3 years ago