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sergey [27]
3 years ago
11

We are setting up virtual shopping tasks on an online survey. In each shopping task, we can only show up to 20 products on the s

creen. There are 80 products in total that we want to test. How many shopping tasks do we need to show so that on average, each product is shown 3 times throughout all the shopping tasks? Assume all products are selected randomly and have an equal chance of being selected.
Mathematics
1 answer:
aleksley [76]3 years ago
7 0

Answer:

Step-by-step explanation:80divide by 20=4

4multiply by 3=12

Answere=12

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Ft
Fofino [41]

Answer:

. We assume, that the number 260 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 260 is 100%, so we can write it down as 260=100%.

4. We know, that x is 6.75% of the output value, so we can write it down as x=6.75%.

5. Now we have two simple equations:

1) 260=100%

2) x=6.75%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

260/x=100%/6.75%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 6.75% of 260

260/x=100/6.75

(260/x)*x=(100/6.75)*x       - we multiply both sides of the equation by x

260=14.814814814815*x       - we divide both sides of the equation by (14.814814814815) to get x

260/14.814814814815=x

17.55=x

x=17.55

now we have:

6.75% of 260=17.55

Step-by-step explanation:

5 0
3 years ago
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Anna35 [415]
C. -5y -4 = -(x+3)^2 -1/2

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Can any one help with this one ?​
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Answer:

48,000

Step-by-step explanation:

320,000÷100=3200

1/100=3200

×15=48,000

therefore 15/100=48,000

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Step 1: Add the two equations together to get just one equation.

2x + y + x - y = 5 + 1

Step 2: Simplify.

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Step 3: Divide by 3 on both sides.

3x / 3 = 6 / 3

x = 2

Therefore, the answer is x=2


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