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kirill [66]
3 years ago
13

Decrease £200 by 12.5%

Mathematics
2 answers:
erastovalidia [21]3 years ago
7 0
25% of £200 = £50
25% divided by 2= 12.5%
£50 divided by 2 = £25
£200-£25 = £175
Sergeu [11.5K]3 years ago
3 0
Non-calculator
Method
100\% = 200
You divide both sides by 10 to get 10%
10\% = 20
You divide by 10 to get 1%
1\% = 2
Now you divide by 2 to get 0.5 (or 1/2 of 1)
0.5 \%= 1
You can find 2% by multiplying 2 to 1% and 2
2\% = 4
Now you need to add the 10% with 0.5% and 2% which give you 12.5%.

12.5\% = 20 + 1 + 4
12.5\% = 25
Now you takeaway 25 from 200
200 - 25 = 175

Decrease 200 by 12.5%
175


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Answer:

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Step-by-step explanation:

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3 years ago
Surgery is in 4 out if every 10 hospital emergency room visits. If a large urban hospital had 840 emergency visits in the past m
Vladimir [108]

Answer:

Expected number of visits to the emergency room that would require a surgery is 336.

Step-by-step explanation:

Let <em>X</em> = number of surgery.

The odds of having a surgery in a randomly selected visit to a emergency room is 4 out of 10.

Then the probability of having a surgery in a randomly selected visit to a emergency room is:

p=\frac{4}{10}=0.40

In the past month a large urban hospital had 840 emergency visits.

An emergency room visit may lead to surgery or not is independent of the others.

The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> = 840 and <em>p</em> = 0.40.

The expected value of a binomial random variable is:

E(X)=np

Compute the expected number of visits that would require a surgery as follows:

E(X)=np

         =840\times 0.40\\=336

Thus, expected number of visits to the emergency room that would require a surgery is 336.

3 0
3 years ago
7a-11=-2(3a-1) what is the work and answer
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3 years ago
jim began to bike a 173 mile bicycle trip to build up stamina for a for a triathlete competition.​ Unfortunately, his bicycle ch
ale4655 [162]

Answer

3.5 hours

Step-by-step explanation:

Let us represent

The time spent walking as x

The time spent riding as y

Jim began a 146​-mile bicycle trip to build up stamina for a triathlete competition.​ Unfortunately, his bicycle chain​ broke, so he finished the trip walking. The whole trip took 5 hours.

Hence:

x + y = 5.... Equation 1

x = 5 - y

If Jim walks at a rate of 4 miles per hour and rides at 40 miles per​ hour,

The formula for Distance = Speed × time. Hence,

4 × x + 40 × y = 146 miles

4x + 40y = 146.... Equation 2

We substitute 5 - y for x in Equation 2

4(5 - y) + 40y = 146

20 - 4y + 40y = 146

Subtract 20 from both sides

20 - 20 - 4y + 40y = 146 - 20

- 4y + 40y = 146 - 20

36y = 126

y = 126/36

y = 3.5 hours

Since the time he spent raiding his bicycle is represented by "y", the amount of time he spent on the bicycle is 3.5 hours      

I think this is right I had this question I think it was the same one I dont know tho

7 0
3 years ago
Which is the next step in the following construction of a regular hexagon?
laila [671]

Answer:

With compass setting the same as line segment PA, place the compass

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Step-by-step explanation:

<em>Lets revise the step of construction a regular hexagon</em>

1. Draw circle with center P; put point A on the circle's edge at

any place

2. With compass setting the same as line segment PA, place the

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3. With compass setting the same as line segment PA, place the

compass at B and draw an arc that intersects the circle at C

4. <em>With compass setting the same as line segment PA, place the</em>

<em>compass at C and draw an arc that intersects the circle</em> at D

5. Contain with the same step of placing the compass at the previous arc and draw an arc with same distance of PA until you reach point A again, then join each arc on the circle forming the regular hexagon

The given steps are:

Circle with center P; point A is along the circles edge, an arc at point B

is along the circles edge, and an arc at point C is along the circles edge

According to the steps above, the next step is:

<em>With compass setting the same as line segment PA, place the </em>

<em>compass at C and draw an arc that intersects the circle</em> (step 4)

7 0
3 years ago
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