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Marta_Voda [28]
3 years ago
15

A set of exam marks has mean 70 and median 65 marks. It is decided to subtract 10 from all the marks. For the new set of marks,

what is the median?
Mathematics
1 answer:
Aleks04 [339]3 years ago
6 0

Answer:

For the new set of marks, the median is of 55

Step-by-step explanation:

The median is the halfway point of a dataset, that is, the value that separates the lower 50% of the data set from the upper 50%.

In a data set, if we subtract or add all marks by x, the median will be subtracted or added by x.

In this question, we have that:

Median 65

From all marks, 10 is subtracted.

So, for the new set of marks, the median is of 65 - 10 = 55

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Evaluate f(x)=7x+7 when x=-9
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Answer:

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Step-by-step explanation:

f(x) = 7x + 7

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We meed to plug in x = -9 into the first equation:

f(-9) = 7(-9) + 7

We can open up the parentheses:

f(-9) = -63 + 7

And then simplify:

f(-9) = -56

7 0
3 years ago
At the bike shop x, it cost $2.75 per hour plus a $3.00 deposit to rent a bike.AT Bike shop z cost $1.75 per hour plus a $7.00 d
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Multiply the rate per hour by the number of hours (n) and add the deposit.

A)

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6 0
3 years ago
4 more than one third of a number n is 6. An equation is? The solution is n =?
harkovskaia [24]

Answer:

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6

Step-by-step explanation:

Given problem:

      4 more than one third of a number n is 6

Unknown:

The equation = ?

Solution of the number  = ?

Solution:

 let the number  = n

So, 4 more than one third of a number;

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  4 more;

                \frac{1}{3}n  + 4

   is 6;

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Let us now solve the equation:

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                   \frac{1}{3}n = 2

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Answer:

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