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3 years ago

Notebook cost $1.20 each. This weekend they will be on sale for $0.80. What percentage is the sale

Mathematics

2 answers:

julsineya [31]3 years ago

4 0

The discount is $.40 (1.20 - 0.80)
To find the discount you take (0.40/1.20) * 100
=.33 * 100
The discount is 33%

ivanzaharov [21]3 years ago

3 0

Answer:

33,33%

Step-by-step explanation:

In order to calculate this you just need to figure out how much does the money that is being removed from the cost is in percentage, we know that the notebook costs 1.20 each, and they are on sale for .80, so to calculate the difference we withdraw from the total cost, the sale cost:

1,20-,80=,40

So the disscount is ,40 dollars, now we use a rule of three to calculate this, using 1,20 as the 100%:

$\frac{1,20}{100}= \frac{,40}{x} \\x=\frac{100*,40}{1,20}\\ x=33,33333$

So we get that the percentage of the disscount will be 33.33%

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Determine the mean of the numbers 6, 17, 22, 28, and 37.

Kipish [7]

To find the mean or the avg you add up all the numbers you have and then divide by how many numbers you added together in this case 5

$6+ 17+22+28+37=110$

$\frac{110}{5} =22$

so the mean is 22, hope this helped you!

4 0

3 years ago

What is the slope of y=-4?

aalyn [17]

Answer:

m=0

Step-by-step explanation:

The slope is m=0 and the Y intercept should be b= -4 .

3 0

2 years ago

Read 2 more answers

Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n= 8 trials, each with

alina1380 [7]

Answer:

0.80589

Step-by-step explanation:

So all of the numbers of correct answers less than 4 are 0,1,2,3

We need to calculate the probability for each separately and then add them together.

To find the probability we have to first find the combination. We know that there’s n=8 trials and that p=0.3. So 1-0.3 gives us 0.7.

The combination formula is: ! / (!(−)!)

So the n would always =8, and the r would be 0,1,2,3. So you would have to calculate it for 0,1,2,3 Separately. This can be done by hand or you can use a simple combinations calculator online.

For 0;

The combination is 1,

1 x 0.3^0 x 0.7^8-0 =

0.057648

For 1;

The combination is 8,

8 x 0.3^1 x 0.7^8-1 =

0.19765

For 2;

The combination is 28

28 x 0.3^2 x 0.7^8-2 =

0.296475

For 3;

The combination is 56

56 x 0.3^3 x 0.7^8-3 =

0.254122

All that’s left is to add these four numbers;

0.057647 + 0.19765 + 0.296475 + 0.254122 = 0.80589

4 0

3 years ago

Help please: A bus and a train leave a station at the same time, t = 0. The graph shows the bus's distance to the next station o

Nonamiya [84]

Answer:

y = (5/2)x + 20

Step-by-step explanation:

Since the bus and train are both at the station at time 0, the y-intercept for the new equation is 20. That is one point on the new graph: (0,20) The question said that the train travels faster, that means it spends less time getting to the next station. The existing graph shows the bus got to the next station in 10 minutes, so maybe the train got there in 8 minutes. So another point on the graph is (8,0) We can use a slope formula to calculate the slope of a new line. Or just count squares on the graph (se image) to find the slope. Slope tells how steep a line is, whether the line is going up or down, but also the slope is like directions how to get from one point to another point on the line.

All you need to write an equation is the slope, m and the y-intercept, b and fill those two numbers into the formula y=mx+b Here slope is 5/2 and y-intercept is 20. So you get

y=(5/2)x +20

5 0

2 years ago

I need help wit this

kramer

Answer:

Step one is incorrect

Step-by-step explanation:

4 0

3 years ago