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3 years ago

Simplify to create an equivalent expression. −3(2+4k)+7(2k−1)

Mathematics

2 answers:

Genrish500 [490]3 years ago

7 0

Answer:

$\huge\boxed{2k-13}$

Step-by-step explanation:

$\sf -3(2+4k)+7(2k-1)\\Expanding \ brackets\\-6-12k+14k-7\\Combining \ like \ terms\\-12k+14k-6-7\\2k -13$

prisoha [69]3 years ago

6 0

2k-13
First step= -3(2+4K)+7(2k-1)
Second step= -6 - (12k) + 14k- 7
Third step= -12k+14k - 6 -7= 2k-13

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FinnZ [79.3K]

Answer:

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Step-by-step explanation:

8 1/4 divided by 5 1/2

Convert to improper fraction

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3 years ago

Read 2 more answers

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ANTONII [103]

Answer:

C is the answer

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3 years ago

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AVprozaik [17]

If you need the answer as a fraction then it is 5/4
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3 years ago

Tap A fills a tank in 4hours while B fills the same tank in 3hours. Tap C empties this tank when full in 2hours. If the tank is

boyakko [2]

Answer:

<em>It will take 12 hours to fill the tank</em>

Step-by-step explanation:

Proportions

Tap A fills a tank in 4 hours. It means each hour it fills 1/4 of the tank.

Tap B fills the tank in 3 hours. Each hour it fills 1/3 of the tank.

Tap C empties the tank when full in 2 hours. Each hour it empties 1/2 of the tank.

Each hour, the tank gets filled by:

$\displaystyle \frac{1}{4}+\frac{1}{3}-\frac{1}{2}=\displaystyle \frac{3}{12}+\frac{4}{12}-\frac{6}{12}=\frac{3+4-6}{12}=\frac{1}{12}$

Since the tank fills 1/12 of its capacity in one hour, it follows that it will take 12 hours to fill the tank

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3 years ago

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sergiy2304 [10]

$3.45\cdot10^8=3.45\cdot100,000,000=345,000,000$

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4 years ago