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2 years ago

20 points

Mathematics

2 answers:

gavmur [86]2 years ago

6 0

Answer:

Michael buys 800 hockey cards from jackson

bezimeni [28]2 years ago

3 0

Answer:

480 cards

Step-by-step explanation:

Step 1: No. of cards Jackson is selling

=> 1000 x 60%

=> 1000 x 0.6

=> 600 cards

Step 2: No. of cards Michael buys

=> 600 x 80%

=> 600 x 0.8

=> 480 cards

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Which graph represents the solution set to the system of inequalities?

Y_Kistochka [10]

Answer:

The answer must be B because the rest are not possible.

Step-by-step explanation:

6 0

3 years ago

At a costumer service call center for a large company, the number of calls received per hour is normally distributed with a mean

Marysya12 [62]

We have been given that at a customer service call center for a large company, the number of calls received per hour is normally distributed with a mean of 150 calls and a standard deviation of 5 calls. We are asked to find the probability that during a given hour of the day there will be between 146 calls and 163 calls.

First of all, we will use z-score formula to find z-score corresponding to 146 and 163.

$z=\frac{x-\mu}{\sigma}$

$z=\frac{146-150}{5}$

$z=\frac{-4}{5}$

$z=-0.8$

$z=\frac{163-150}{5}$

$z=\frac{13}{5}$

$z=2.6$

Our next step is to find percentage of data scores falls between both z-scores.

$P(-0.8$

Using normal distribution table, we will get:

$P(-0.8$

Let us convert our answer into percentage.

$0.78348\times 100\%=78.348\%$

Upon rounding our answer to nearest thousandths, we will get:

$78.348\%\approx 78.35\%$

Therefore, the probability that during a given hour of the day there will be between 146 calls and 163 calls is approximately $78.35\%$ .

8 0

3 years ago

Make r the subject of the formula in I=E/R+r

allochka39001 [22]

Step-by-step explanation:

$I = \frac{E }{ R} + r$

$I - \frac{ E }{ R} = r$

$\frac{I R -E }{ R} = r$

HOPE IT HELPS Y

8 0

2 years ago

Help

alex41 [277]

Answer:

0.6

Step-by-step explanation:

In this question, the | symbol means "given", so we can phrase the question as "Find the probability that a student watches more than one hour of TV given that they are in the 6th period class"

Next, because there is a 100% chance that the student is in the 6th period class, we can disregard the results of the 3rd period class.

Given that the student is in the 6th period class, there are 15 total students (as 9+6=15 = the sum of the yes and no answers for 6th period) and 9 students that said yes. Therefore, there is a 9/15 = 3/5 = 0.6 probability that a student watches more than 1 hour of TV given that they are in the 6th period class

8 0

3 years ago

Are 5(8y - 8) and 40y - 40 equal?

g100num [7]

Answer:

Step-by-step explanation:

5 * 8y = 40y

8 * 5 = 40

40y - 40 IS equal to 40y - 40

7 0

3 years ago

Read 2 more answers