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3 years ago

Bottles of water are on sale!

Mathematics

1 answer:

kipiarov [429]3 years ago

6 0

You payed less because 1.69x4 is 6.76 which is more than 5 dollars

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13. Kim has $4.25 in change, including

BartSMP [9]

Hi!

It would be B, because when we do $4.25-$2.60=$1.65. When we divide that be 0.25, that equals 6.6, but you can't have a percent of a coin, so we round down.

Hope this helped!

3 0

3 years ago

You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question. Suppose that you h

stepan [7]

Answer:

(a) The expected score is 12.8

(b) The standard deviation is 3.2 and variance is 10.24

Step-by-step explanation:

Consider the provided information.

You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question.

Here n=64 p=1/5 and q=1-1/5=4/5

Part (a) we need to find the expected score on the exam.

Expected = np

Expected score = number of questions × P(right)

$Score = 64 \times \frac{1}{5} = 12.8$

Hence, the expected score is 12.8

Part (b) Compute the variance and standard deviation of x.

Standard Deviation: $\sigma =\sqrt{npq}$

Now calculate the standard deviation as shown:

$\sigma =\sqrt{64\times \frac{1}{5}\times \frac{4}{5}}$

$\sigma =\sqrt{\frac{256}{25}}$

$\sigma =\frac{16}{5}=3.2$

Variance: $\sigma^2 =npq$

$\sigma^2 =64\times \frac{1}{5}\times \frac{4}{5}$

$\sigma^2 =\frac{256}{25}$

$\sigma^2 =10.24$

Hence, the standard deviation is 3.2 and variance is 10.24

5 0

4 years ago

Question:Choose the correct scale factor:<br> A)2<br> B)1/2<br> C)3<br> D)1/3

aleksandrvk [35]

The length of ND = 3 units

The length of N'D' = 6

6 / 3 = 2

The scale factor is 2

7 0

3 years ago

Read 2 more answers

Mr. Cornapple is the fruit & vegetable buyer for a large school district. In a given week, he has a budget of $6,550. Bushel

Nina [5.8K]

Answer:

40x + 30y ≤ 6,550

Step-by-step explanation:

Given:

Cost of each apple bushels = $40

Cost of each corn bushels = $30

Total budget = $6,550

Find:

Inequality

Computation:

Assume;

Total number of apple bushels = x

Total number of corn bushels = y

So,

40x + 30y ≤ 6,550

6 0

3 years ago

Simplify the expressions distributing the negatives and combining like terms. Did I do this right Answer 3t+1

horrorfan [7]

Nope the answer is -3t-1
Work:
-1/2(6t+2)
-1/2x2(3t+1)
-(3t+1)
-3t-1

5 0

3 years ago