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2 years ago

Find the Surface Area of the cone.

Mathematics

1 answer:

STatiana [176]2 years ago

6 0

Cone surface area:

πr(r + s)

= 3,14 × 3 × (3 + 7)

= 3,14 × 3 × 10

= 9,42 × 10

= 94,2 m²

Nt: I from IDN

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Which statements describe a parallelogram that must be a rectangle? Select each correct answer. parallelogram with opposite side

Delicious77 [7]

The following statements are true for a parallelogram that must be a rectangle.

parallelogram with a right angle

parallelogram with congruent diagonals

A Parallelogram is a flat shape with opposite sides parallel and equal in length. Squares, rectangles and rhombuses are all parallelograms but with slight differences.

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3 years ago

Simplify the expression: 4x(x2 + 6x - 1) will mark brainliest pls help<3

Rufina [12.5K]

I think it’s 4x3 + 24x2 - 4x

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3 years ago

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43. Simplify (k – 5) - (k2 + 8).

lesantik [10]

Answer:

(D) -k2 + k - 13

Step-by-step explanation:

Pulling out like terms :

2.1 Pull out like factors :

-k2 + k - 13 = -1 • (k2 - k + 13)

Trying to factor by splitting the middle term

2.2 Factoring k2 - k + 13

The first term is, k2 its coefficient is 1 .

The middle term is, -k its coefficient is -1 .

The last term, "the constant", is +13

Step-1 : Multiply the coefficient of the first term by the constant 1 • 13 = 13

Step-2 : Find two factors of 13 whose sum equals the coefficient of the middle term, which is -1 .

-13 + -1 = -14

-1 + -13 = -14

1 + 13 = 14

13 + 1 = 14

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

Final result :

-k2 + k - 13

Processing ends successfully

plz mark me as brainliest :)

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4 years ago

Read 2 more answers

What is y=2x+4 and y=-7x+-3

kozerog [31]

Answer:

They are a system of equations?

Step-by-step explanation:

Not sure if this is what you are asking

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3 years ago

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Is my answer correct or no? <br> ---> show explanation & details if i am wrong!!!

neonofarm [45]

Answer:

No, because the distance from the origin to point (7 , -7) is greater than the radius of the circle ⇒ 3rd answer

Step-by-step explanation:

From the graph of the circle

∵ The center of the circle F is at the origin

∴ F is (0 , 0)

∵ The circle passes through point (7 , 0)

- The length of the radius of the circle is the distance between

the center of the circle and a point on the circle

∴ r is the distance between points (0 , 0) and (7 , 0)

∴ $r=\sqrt{(7-0)^{2}+(0-0)^{2}}=\sqrt{49}=7$

∴ The length of the radius of the circle is 7 units

Let us find the distance between point (7 , -7) and the origin (0 , 0)

If the distance is equal to the radius of the circle, then the point is on the circle
If the distance is greater than the radius, then the point is outside the circle
If the distance is less than the radius, then the point is inside the circle

∵ The distance = $\sqrt{(7-0)^{2}+(-7-0)^{2}}=\sqrt{49+49}=\sqrt{98}=7\sqrt{2}$

∵ r = 7

∵ $7\sqrt{2}$ > 7

∴ The distance is greater than the radius of the circle

∴ Point (7 , -7) lies outside the circle

The correct answer is:

No, because the distance from the origin to point (7 , -7) is greater than the radius of the circle

<em>Your answer is not correct, the correct answer is the 3rd answer</em>

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3 years ago