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Vitek1552 [10]
3 years ago
13

The difference between a number and three is multiplied by negative six. The result is eighteen. What is the number? Write an eq

uation that can be used to find the number, n . Solve the equation you wrote in part A to find the value of the number. Include all of your work in your answer.

Mathematics
1 answer:
trapecia [35]3 years ago
8 0

Answer:

that is the solution to the question

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A circle is shown. 2 tangents intersect at a point outside of the circle to form an angle with a measure of 70 degrees. The tang
Rudik [331]

Answer: 250°

Step-by-step explanation:

3 0
3 years ago
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Find the dimensions of a cylinder of volume 17 m3 of minimal cost if the top and bottom are made of material that costs twice as
Viefleur [7K]

Answer:

The answer is below

Step-by-step explanation:

The volume of the cylinder with radius (r) and height (h) is given as:

Volume = πr²h

17 = πr²h

h = 17 / πr²

Let k represent the cost of the side and 2k the cost of the bottom.

The area of the side = 2πrh, hence the cost of the side = k(2πrh)

The area of the top and bottom = 2πr², hence the cost of the top and bottom = 2k(2πr²)

The total cost (T) = cost of side + cost of the top and bottom

T = k(2πrh) + 2k(2πr²)

T = 2kπ(rh + 2r²)

Put h = 17/πr²

T = 2kπ (r×17/πr² + 2r²)

T = 2kπ(17/πr + 2r²)

The minimal cost is at dT/dr = 0

\frac{dT}{dr} =0=\frac{d}{dr} [2k\pi(\frac{17}{\pi r} +2r^2)]\\\\4r-\frac{17}{\pi r^2} =0\\\\4r=\frac{17}{\pi r^2}\\\\r^3=\frac{17}{4\pi }=1.35\\\\r=\sqrt[3]{1.35}\\\\r=1.1\ m\\\\h=\frac{17}{\pi r^2}  =\frac{17}{\pi (1.1)^2} \\\\h=4.42\ m

5 0
3 years ago
( 97 )^2 evaluate of the following by using identities​
Neko [114]

Answer:

9409

Step-by-step explanation:

Let's rewrite 97 as 100 - 3.

Identity used :

<u><em>(a - b)² = a² - 2ab + b²</em></u>

Now, evaluating the expression :

⇒ (100 - 3)²

⇒ (100)² - 2(100)(3) + (3)²

⇒ 10000 - 600 + 9

⇒ 9400 + 9

⇒ 9409

8 0
2 years ago
Read 2 more answers
-5x-3y=22 help plz ​
Lerok [7]

Answer:

<h2>(-2, -4)</h2>

Step-by-step explanation:

Put the coordinates of the points to the equation, and check it:

(-4, -1) → x= -4, y = -1

L = -5(-4) - 3(-1) =20 + 3 = 23

R = 22

L ≠ R

(-1, -4) → x= -1, y = -4

L = -5(-1) - 3(-4) = 5 + 12 = 17

R = 22

L ≠ R

(-2, -4) → x= -2, y = -4

L = -5(-2) - 3(-4) = 10 + 12 = 22

R = 22

L = R    CORRECT :)

(-4, -2) → x = -4, y = -2

L = -5(-4) - 3(-2) = 20 + 6 = 26

R = 22

L ≠ R

3 0
3 years ago
Your are part of a team studying an endangered species of land snail in upstate New York. You and your colleagues capture and ma
ELEN [110]

Answer:

720 individuals

Step-by-step explanation:

According to my research, I can say that based on the information provided within the question you can conclude that the population of land snails has about 720 individuals. We can calculate this by using the Rule of Three formula that is attached below.

 x   ⇒   80 marked

45   ⇒   5 marked

\frac{45*80}{5} = x

720= x

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

6 0
3 years ago
Read 2 more answers
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