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3 years ago

12

four houses each have four floors. On each floor are four apartments, with four doors in each apartment. On each door are four h

inges. How many hinges are there in the four houses?

1 answer:

alexgriva [62]3 years ago

7 0

256 hinges. 4 x 4 = 16. 16 x 4 = 64. 64 x 4 = 256

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Solve the equation m2 + 6m = –4 using the quadratic formula. A. m = –3±√ 5 B. m = 5±√ 3 C. m = 3±√ 5 D. m = –5±√ 3

USPshnik [31]

Answer: m = –3±√ 5

m=

−b±√b2−4ac

2a

m=

−(6)±√(6)2−4(1)(4)

2(1)

m=

−6±√20

2

m=−3+√5 or m=−3−√5

7 0

2 years ago

Can you please help me with this i will give you a Brainiest

il63 [147K]

Answer:

Step-by-step explanation:

13

6 0

3 years ago

Read 2 more answers

Apparently Nobody is able to answer this question. You can search it up but I've tried that already, still no answer.

damaskus [11]

Answer:

if it is odd then multiply it by 3 and add 1, and if it is even, divide it by 2. Then repeat this process as long as you can.

Step-by-step explanation:

hope dis helped:)

8 0

2 years ago

Somebody please help! Marked Brainliest!

olga nikolaevna [1]

Answer:

Part A:

The surface area of a cylinder is given by

A= 6πr² if h= 2r

Part B:

Total Cost of covering the cylinder = Rate *2πrh + rate*2πr²

Cost of covering only the side = Rate *2πrh

Step-by-step explanation:

Part A:

The surface area of a cylinder is given by

A= 2πrh + 2πr²

Where h= height and radius = r

But we have the height twice as radius so h= 2r

So putting h= 2r we get

A= 2πr(2r) + 2πr²

A= 4πr² + 2πr²= 2πr²(2+1) = 2πr²(3)= 6πr²

Part B:

Cost = Rate * area of the wall + rate * area of the top and bottom

Cost = Rate *2πrh + rate*2πr²

Where area of the top and bottom= πr² +πr² =2 πr²

and area of the side = 2πrh

Multiplying both with the rate and then adding would give the total cost of materials needed to cover the outside of the cylinder and from top and bottom as well.

If you do not need to cover top and bottom then the expression would be

Cost of covering only the side = Rate *2πrh

Part C:

Already done above.

4 0

3 years ago

A bag contains 9 red marbles, 9 white marbles, and 6 blue marbles. You draw 3 marbles out at random, without replacement. What i

Dvinal [7]

Answer:

21/506

Step-by-step explanation:

$\frac{9}{24} x\frac{8}{23}x \frac{7}{22}$ then you can simplify which gets you 21/506. Hope this helps :)

3 0

3 years ago