How is this problem simplified? I'm confused on how they got 11 and I'm assuming they got 12 by adding 2+10?

Mathematics

1 answer:

Natalka [10]3 years ago

4 0

We can show that this is true by doing this

2√3+10√3-1√3
undistribute √3
(√3)(2+10-1)
(√3)(12-1)
(√3)(11)
11√3

yah, that's what they did, but I just showed that it works

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inessss [21]

Given that,

Colin buys a box of pasta that contains 823 cups of pasta.

He uses 212 cups to make dinner.

To find,

How much pasta is left?

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Left pasta = Total cups of pasta - used cups of pasta

= 823 - 212

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Rainfall collected in a rain gauge was found to be 2.3 cm when rounded to the nearest tenth of a centimeter.

Korolek [52]

Answer:

(a). 2.251 cm , 2.349 cm, 2.295 cm

(b). 0.023 meters.

Step-by-step explanation:

(a). We are asked to to choose the options that shows the actual measurement of the rainfall.

Since the rounded figure is 2.3 cm, this means that either the tenths digit is 3 with hundredths digit less than 5, or tenths digit is 2 with hundredths digit greater than or equal to 5.

Let us check our given choices one by one.

$2.251\text{ cm}\approx 2.3\text{ cm}$