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3 years ago

A pizza restaurant allows you to choose any 2 of 7 toppings. How many

Mathematics

2 answers:

Helga [31]3 years ago

6 0

Answer: 21 different ways of choosing the toppings

Step-by-step explanation:

Nadusha1986 [10]3 years ago

5 0

Answer:

Step-by-step explanation:

You have 7 options for two toppings, to find the numer of combinatios you need to do the following:

$\frac{7*6}{2} =\frac{42}{2} =21$

this is because you have 7 toppings, so for the first one you are going to choose you have all the 7 options available, then for the second one, since you already picked one, you have 6 options left. This is why you multiply 7*6 =42

and finally divide by 2 to eliminate the duplicates. For example in the 42 options you have both pepperoni with ham, and ham with pepperoni, this are really the same combination just in a different order, so you must divide by two.

The answer is 21 combinations

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If I was born in 1946 what year was I twenty years old

oee [108]

Answer:

If you was born in 1946 you would be twenty years old in:

1946+20

1966

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2 years ago

9 = 3(5t -2) help pls

horsena [70]

Answer:

t=1

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

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2 years ago

How do I do this X+y=-4 3x-6y=15

avanturin [10]

Answer:

x=-1, y=-3. (-1, -3).

Step-by-step explanation:

x+y=-4

3x-6y=15

---------------

x=-4-y

3(-4-y)-6y=15

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3 years ago

12% of what number is 180? A. 15 B. 150 C. 1500 D. 21.6

Doss [256]

The correct answer is C

4 0

3 years ago

Read 2 more answers

slader Suppose that 8% of all bicycle racers use steroids, that a bicyclist who uses steroids tests positive for steroids 96% of

d1i1m1o1n [39]

Answer:

P = 0.4812

Step-by-step explanation:

First, we need to use here two expressions and then do the calculations.

The first one is the conditional probability which is:

P(B|A) = P(A∩B)/P(A) (1)

The second expression to use has relation with the Bayes's theorem which is the following:

P(D|C) = P(C|D)*P(D) / P(C|D)*P(D) + P(C|d)*P(d) (2)

Now, the expression (2) is the one that we will use to calculate the probability of a selected random bicyclist who tests positive for steroids.

So, in this case, we will call C for positive and D that is using steroids and d is the opposite of d, which means do not use steroids.

Then, the probabilities are the following:

P(D) = 8% or 0.08

P(C|D) = 96% or 0.96

P(C|d) = 9% or 0.09

P(d) = 1 - 0.08 = 0.92

With these data, let's replace in expression 2

P(D|C) = 0.96 * 0.08 /0.96 * 0.08 + 0.09*0.92

P(D|C) = 0.0768 / 0.1596

P(D|C) = 0.4812 or 48.12%

8 0

3 years ago