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3 years ago

For my lil brother don’t feel like solving it

Mathematics

1 answer:

Anna [14]3 years ago

7 0

Vas happenin!!

1. 13

2. 19

3. 23

4. 41

5. 12

6. 6

7. 18

8. 12

9. 9

10. 35

11. 29

12. 15

Hope this helps

-Zayn Malik

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4. Muthu had 4 times as many stamps as

RSB [31]

Answer:

20 stamps

Step-by-step explanation:

Let x be Muthu's original count

Let y be Sangeetha's original count

x = 4y

x - 12 = y + 12

y = x - 24

x = 4(x - 24)

x = 4x - 96

3x = 96

x = 32

so 32 - 12 = 20

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3 years ago

Solve for h in this equation

Mariana [72]

$a = \frac{1}{2} (b1 + b2)h \\ \frac{a}{\frac{1}{2} (b1 + b2)} = h \\ \frac{2a}{b1 + b2} = h$

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3 years ago

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cestrela7 [59]

Answer:

Step-by-step explanation:

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3 years ago

Use differentials to estimate the amount of metal in a closed cylindrical can that is 26 cm high and 10 cm in diameter if the me

Afina-wow [57]

Answer:

The estimated amount of metal in the can is 87.96 cubic cm

Step-by-step explanation:

We can find the differential of volume from the volume of a cylinder equation given by

$V= \pi r^2 h$

Thus that way we will find the amount of metal that makes up the can.

Finding the differential.

A small change in volume is given by:

$dV =\cfrac{\partial V}{\partial h} dh + \cfrac{\partial V}{\partial r} dr$

So finding the partial derivatives we get

$dV =\pi r^2 dh + \pi 2r h dr$

$dV =\pi r^2 dh + 2\pi r h dr$

Evaluating the differential at the given information.

The height of the can is h = 26 cm, the diameter is 10 cm, which means the radius is half of it, that is r = 5 cm.

On the other hand the thickness of the side is 0.05 cm that represents dr = 0.05 cm, and the thickness on both top and bottom is 0.3 cm, thus dh = 0.3 cm +0.3 cm which give us 0.6 cm.

Replacing all those values on the differential we get

$dV =\pi 5^2 (0.6) + 2\pi (5) (26) (0.05)$

That give us

$V= 28 \pi \, cm^3$

Or in decimal value

$\boxed{dV= 87.96 \, cm^3}$

Thus the volume of metal in the can is 87.96 cubic cm.

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3 years ago

If Ab = 54, find MC.

AnnyKZ [126]

Answer:

MC = 45

Step-by-step explanation:

Δ ABH and Δ MCH are similar and the ratios of corresponding sides are equal, that is

$\frac{AB}{MC}$ = $\frac{AH}{MH}$ , substitute values

$\frac{54}{MC}$ = $\frac{6}{5}$ ( cross- multiply )

6MC = 270 ( divide both sides by 6 )

MC = 45

8 0

3 years ago