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riadik2000 [5.3K]
3 years ago
8

WHAT IS THE HCF OF 21 28 42

Mathematics
1 answer:
gulaghasi [49]3 years ago
8 0

Answer:

7.

Step-by-step explanation:

21 = 3 * 7

28 = 2 * 2 * 7

42 = 2 * 3 * 7

Collecting common factors:

t is common to all 3 sets of factors so

HCF = 7.

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If a child accidentally swallowed 1.6 fluidounces of FEOSOL Elixir, containing 2/3 gr of ferrous sulfate per 5 mL, how many mill
GuDViN [60]

Answer:

the amount of ferrous sulphate child will digest = 213.3 mg

Step-by-step explanation:

Given,

Amount of FEOSOL Elixir swallowed by child = 1.6 Fluid ounces

                                                                           = 1.6 x 29.57 ml

                                                                           = 47.312 ml

\textrm{Amount of ferrous sulphate contained in 5 ml of of solution}=\ \dfrac{2}{3}\ grams

\textrm{So, amount of ferrous sulphate contained in 1 ml of solution}\ =\ \dfrac{2}{3\times 5}

                                                                    =\ \dfrac{2}{15}

\textrm{So,the amount of ferrous sulphate contained in the 1.6 ml of FEROSOL}=1.6\times \dfrac{2}{15}

                  =\ \dfrac{3.2}{15}

                  = 0.2133 gram

                  = 213.3 mg

So, the amount of ferrous sulphate child will digest = 213.3 mg

8 0
4 years ago
-3x - 5y = -15<br> -3 - 3y = -3
lara [203]

Answer:

1) x = -y + 5

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Step-by-step explanation:

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3 years ago
Josie is training for a race. The ratio of the number of minutes she runs to the number of miles she runs is 24 to 3. She plans
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Answer:

80 minutes is required by Josie to cover 10 miles.

Step-by-step explanation:

Let 'x' minutes needed to run 10 miles.

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Ratio of minutes taken to miles covered is 24 to 3.

Number of miles covered is 10 miles.

As per question:

24 minutes is required to cover 3 miles.

So, 'x' minutes is required to cover 10 miles.

Setting up a proportion and applying cross multiplying method, we get:

\dfrac{x}{10}=\dfrac{24}{3}\\\\x\times 3=24\times 10\\\\3x=240\\\\x=\frac{240}{3}\\\\x=80\ minutes

Therefore, 80 minutes is required by Josie to cover 10 miles.

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3 years ago
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dsp73

Answer: 1/6


Step-by-step explanation: ok, so he had mowed 1/3 of a field in 2 hours. Take 1/3 and divide by 2 hours to get 1/6


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