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ikadub [295]
3 years ago
8

Karen wants to buy a $22.50 jacket that is marked 20% off. Select from the drop-down menu to correctly complete the sentence. Th

e best estimate for the discount can be found using the expression
Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
8 0

Answer:

\$22.50*0.20=\$4.50

Step-by-step explanation:

Let

x-------> original price

y------> percentage of discount

z-----> discount

we know that

z=xy

In this problem we have

x=\$22.50

y=20\%=\frac{20}{100}=0.20

Substitute the values

z=\$22.50*0.20=\$4.50

Oksanka [162]3 years ago
6 0

discount = price times % off

 discount = 22.50 x 0.20

discount = $4.50



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sergij07 [2.7K]

Answer:

B, 110

Step-by-step explanation:

Work Backwards!

1.- 260 - 110 = 150 children

2.- 150 X $2.50 (rate of children) = $375

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7 0
2 years ago
Question 4 of 10, Step 1 of 1 1/out of 10 Correct Certify Completion Icon Tries remaining:0 The Magazine Mass Marketing Company
erastovalidia [21]

Answer:

0.0105 = 1.05% probability that no more than 3 of the entry forms will include an order.

Step-by-step explanation:

For each entry form, there are only two possible outcomes. Either it includes an order, or it does not. The probability of an entry including an order is independent of any other entry, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

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They know that the probability of receiving a magazine subscription order with an entry form is 0.5.

This means that p = 0.5

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At most 3 including an order, which is:

P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

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P(X = 2) = C_{16,2}.(0.5)^{2}.(0.5)^{14} = 0.0018

P(X = 3) = C_{16,3}.(0.5)^{3}.(0.5)^{13} = 0.0085

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6 0
2 years ago
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lisov135 [29]

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Step-by-step explanation:

A constant is a numerical expression like 2, 0,78 etc .

A variable is a alphabetical expression that vary like a,b,c,d,x,y,z.

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tigry1 [53]

Answer:

70/100

0.7

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Step-by-step explanation:

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sweet [91]
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