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viva [34]
3 years ago
7

What is the rational number equivalent to 1.28 repeating

Mathematics
1 answer:
Anna007 [38]3 years ago
6 0
100*1.2828...= 128.28282828..( so on..)
100x=128.28 

then you do 100x - x = 128.2828...- 1.2828..

then we subtract the .282828... part

99x = 127

then divide boths sides by 99 and then x=127/99
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To rationalize the denominator 2 sqrt 10/ 3 sqrt 11 you should multiply the expression by which fraction
malfutka [58]

Answer:

B

Step-by-step explanation:

To rationalise the denominator.

Multiply the numerator/denominator by the radical on the denominator.

The radical on the denominator is \sqrt{11}, thus

Multiply the fraction by

\frac{\sqrt{11} }{\sqrt{11} } → B

7 0
3 years ago
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Oksi-84 [34.3K]

Answer:

B

Step-by-step explanation:

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There were 60 points on Tom's first math test. He scored 75% of the points. How many points did Tom earn? a 60 b 45 c 15 d 50
Lana71 [14]
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4 years ago
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Find the volume of the triangular prism in the picture shown. Round your answer to the
Olenka [21]

Given:

A figure of a triangular prism.

Height of triangular base = 9\dfrac{2}{3} yd

Base of triangular base = 4 yd

Height of prism = 4 yd.

To find:

The volume of the triangular prism.

Solution:

Volume of a triangular prism is:

V=Bh              ...(i)

Where, B is the area of triangular base and h is the height of the prism.

Area of triangular base is:

B=\dfrac{1}{2}\times base\times height

B=\dfrac{1}{2}\times 4\times 9\dfrac{2}{3}

B=2\times \dfrac{29}{3}

B=\dfrac{58}{3}

Putting B=\dfrac{58}{3} and h=4 in (i), we get

V=\dfrac{58}{3}\times 4

V=\dfrac{232}{3}

V=77.33...

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The volume of the triangular prism is 77.3 cubic yards. Therefore, the correct option is 2.

4 0
3 years ago
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stellarik [79]

D. 75 cm

Step-by-step explanation:

fill in the y with 20.5, so you get 20.5=0.3x-2. Add the 2 to the 20.5 so you get 22.5=0.3x. Divide both by 0.3 to get 75=x.

sorry if it's a bd explanation, hope this helps :)

4 0
3 years ago
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