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3 years ago

9

Hello Does anyone know what 4 3/5 x 2/3 :)

1 answer:

Leokris [45]3 years ago

3 0

let's firstly convert the mixed fractions to improper fractions and then multiply.

$\bf \stackrel{mixed}{4\frac{3}{5}}\implies \cfrac{4\cdot 5+3}{5}\implies \stackrel{improper}{\cfrac{23}{5}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{23}{5}\cdot \cfrac{2}{3}\implies \cfrac{23\cdot 2}{5\cdot 3}\implies \cfrac{46}{15}\implies 3\frac{1}{15}$

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Suppose a railroad rail is 3 kilometers and it expands on a hot day by 15 centimeters in length. Approximately how many meters w

earnstyle [38]

Answer:

Answer: 13.4 m

Step-by-step explanation:

For small angles, x, in radians,

tan(x) ≈ sin(x) = x

Use this to create an approximate diagram for the problem as shown in the figure below.

The actual deflected shape is parabolic, but it is approximated by an isosceles triangle with small equal angles.

The extend length is 3 km + 12 cm, which is

3000 + 0.12 = 3000.12 m

Half of the extended length is 1500.06 m

Let h+ the rise of the center of the rail above ground.

From the Pythagorean theorem, obtain

h² + 1500² = 1500.6²

h² = 1500.06² - 1500² = 180.004

h = 13.4 m, which is about 0.9% of the original length.

Read more on Brainly.com - brainly.com/question/5596356#readmore

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2 years ago

Coffee table is 20% odd the original price of $115. If there is 7.5% sales tax, what is the final price of the coffee table?

netineya [11]

100%-20%= 80%=0.8

115(0.8)= 92

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The final price of the coffee table is $98.90.

Hope this helps!

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3 years ago

What is an equivalent mixed number for the decimal 16.3

ZanzabumX [31]

Answer:

The answer is 5 1/3 or five one thirds

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3 years ago

Find the average speed of car if it travels 18km in 20 minutes.

Lena [83]

Answer:

$\boxed{\sf Average \ Speed = 54\ km/hr}$

Step-by-step explanation:

<u><em>Given: </em></u>

Distance = S = 18 km

Time = t = 20 min = 20/60 = 0.33 hours

<u><em>Required:</em></u>

Average Speed = <v> = ?

<em><u>Formula:</u></em>

Average Speed = Total Distance Covered / Total Time Taken

<u><em>Solution:</em></u>

A . S = 18 / 0.33

A.S = 54 km/hr

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2 years ago

Read 2 more answers

Factor the trinomial completely.<br> 4u^4 + 4u^3 - 6u^2

Ulleksa [173]

Answer:

See below.

Step-by-step explanation:

So we have the expression:

$4u^4+4u^3-6u^2$

First, factor out the GCF.

The GCF is 2u². Thus:

$=2u^2(2u^2+2u-3)$

And this is the simplest it can get.

So we are done :)

5 0

2 years ago