What is the formula for combinations

Mathematics

1 answer:

Oksi-84 [34.3K]3 years ago

3 0

Where nPr is the formula for permutations of n objects taken r at a time.

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PLEASE HELP i need help

Helen [10]

Answer:

Domain {-2, -1, 1}

Range {-4, -2, 2, 4}

Domain {0, 1, 2}

Range {-2, 0, 2, 3}

Domian {-4, -1, 1, 2}

Range {-7, -4, 2}

8 0

3 years ago

This recipe makes 4 portions of potato soup.

Dominik [7]

Answer:

120 ml oil

150g onions

1.2 kg potatoes

1.5 litres milk

Step-by-step explanation:

The revipe serves 4 people, but Richard wants to serve 12 people. This is 3x the number of people intended.

So, multiply all the fiven ingredients by 3 as well.

Oil = 40ml x 3 = 120ml

Onions = 50g x 3 = 150g

Potatoes = 400g x 3 = 1200g = 1.2 kg

Milk = 500ml x 3 = 1500ml = 1.5 litres

Hope this helps

4 0

3 years ago

Read 2 more answers

each time kim pour water from a jug into a glass, exactly 10% of the water remaining in the jug is used. What is the minimum num

Gnoma [55]

The correct answer is:

At least 7 times.

Explanation:

Since 10% of the water in the jug is removed each time, this means that 100-10=90% of the water remains.

After two times, we would have 0.9(0.9) = 0.81 = 81% of the water; each time she pours, the number of times 0.9 is multiplied by itself changes. This makes this an exponential inequality (it is not an equation, as we want "less than half of the water"):

$0.5 < 0.9^x$