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3 years ago

Need some help with this question in this picture please

Mathematics

1 answer:

Inessa05 [86]3 years ago

6 0

$20 sold / .50(each flowers) = 40 flowers

She sold 40 flowers for $20

She makes $6 on every $20

$20 - $6 = $14 (she paid $14 for 40 flowers)

Each flower she paid = $14 / 40 = 0.35 (35 cents)

Answer:

She paid 35 cents per flower

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Select all the names for a in the expression.

Lunna [17]

Answer:

In this equation "a" is a variable.

Step-by-step explanation:

A variable is a term used that does not necessary have a value attached to it. Instead any value can be input in for it.

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3 years ago

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In a state where license plates contain six digits, what is the probability that the license number of a randomly selected car h

andre [41]

Answer:

Step-by-step explanation:

Given : In a state where license plates contain six digits.

Probability of that a number is 9 = $\dfrac{1}{10}$ [Since total digits = 10]

We assume that each digit of the license number is randomly selected .

Since each digit in the license plate is independent from the other and there is only two possible outcomes for given case (either 9 or not), so we can use Binomial.

Binomial probability formula: $P(X=x)=^nC_xp^x(1-p)^{n-x}$

, where n= total trials , p = probability for each success.

Let x be the number of 9s in the license plate number.

$X\sim Bin(n=6, p=\dfrac{1}{10}})$

Then, the probability that the license number of a randomly selected car has exactly two 9's will be :

$P(X=2)=^6C_2(\dfrac{1}{10})^2(1-\dfrac{1}{10})^{6-2}\\\\=\dfrac{6!}{2!(6-2)!}(\dfrac{1}{100})(\dfrac{9}{10})^4=0.098415$

Hence, the required probability = 0.098415

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3 years ago

500 plates cost $18.00 what does each plate cost

ozzi

Answer:

$0.036

Step-by-step explanation:

I will be solving this questions in a rational, proportional way.

This question given is directly proportional. There are two types of proportion.

Direct - Let's say there are two values, x and y. In direct proportion, while x increases, y increases with it.

Inverse- Taking x and y, in inverse proportion, while x increases, y decreases or while y increases, x decreases.

In the given example, there are two values, number of plates and cost of plates. While the number of plates increases, the cost would surely increase. Therefore, giving us that it is a direct proportion.

500 plates : $18.00 :: 1 : $x

500 plates is to 18 dollars, then, 1 plate is to how many dollars?

In direct proportion, the product of extremes is equal to the product of means.

500(x) = 18(1)

500x = 18

x = 18 / 500

x = 0.036

Hence, one plate costs $0.036 or 3.6 cents

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3 years ago

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Kaleb rode his bike at a rate of 10 mph for 2 hours. How far did he ride?