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ioda
3 years ago
13

The final grade in a biology course is determined by a score from 0 to 100, which has three components; a laboratory component o

f 25%, two hour-exams that together contribute 25% and a final exam that contributes 50%. There are 100 possible points for the laboratory, 50 possible points for each hour exam and 100 possible points for the final. A student in the course got 75 points for the laboratory, 40 and 38 points for the two hour exams and 85 points for the final. use weighted mean to determine his overall score (from 0 to 100) for the course
Mathematics
1 answer:
vovangra [49]3 years ago
7 0

Answer:

75*25%+(38+40)*50%+85*25%=59.5

Step-by-step explanation:

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k(-3)=36(2)

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3 years ago
Which situations can be represented by a linear function?
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A linear function is when a variable y varies directly with a variable x. That is, when y increases, x also increases and the opposite is also true. THerefore, the correct answer from the choices listed above is the first option. Every day, the number of bacteria in the dish is 3 times what it was the previous day can be <span>represented by a linear function.</span>
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3 years ago
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The price of a watch was increased by 20% to £162. What was the price before the increase?
vfiekz [6]

Answer:

= £135

Step-by-step explanation:

Original price = 100%

Percentage increase = 20%

New price = 100% + 20% = 120%

If 120% = £162

What about 100% = ?

= (100 x 162) ÷ 120

= 16200 ÷ 120

= £135

6 0
3 years ago
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If n is a positive integer, how many 5-tuples of integers from 1 through n can be formed in which the elements of the 5-tuple ar
erma4kov [3.2K]

Answer:

\frac{(n+4)*(n+3)*(n+2)*(n+1)*n}{120}

Step-by-step explanation:

Given

5 tuples implies that:

n = 5

(h,i,j,k,m) implies that:

r = 5

Required

How many 5-tuples of integers (h, i, j, k,m) are there such thatn\ge h\ge i\ge j\ge k\ge m\ge 1

From the question, the order of the integers h, i, j, k and m does not matter. This implies that, we make use of combination to solve this problem.

Also considering that repetition is allowed:  This implies that, a number can be repeated in more than 1 location

So, there are n + 4 items to make selection from

The selection becomes:

^{n}C_r => ^{n + 4}C_5

^{n + 4}C_5 = \frac{(n+4)!}{(n+4-5)!5!}

^{n + 4}C_5 = \frac{(n+4)!}{(n-1)!5!}

Expand the numerator

^{n + 4}C_5 = \frac{(n+4)!(n+3)*(n+2)*(n+1)*n*(n-1)!}{(n-1)!5!}

^{n + 4}C_5 = \frac{(n+4)*(n+3)*(n+2)*(n+1)*n}{5!}

^{n + 4}C_5 = \frac{(n+4)*(n+3)*(n+2)*(n+1)*n}{5*4*3*2*1}

^{n + 4}C_5 = \frac{(n+4)*(n+3)*(n+2)*(n+1)*n}{120}

<u><em>Solved</em></u>

6 0
3 years ago
Math, area all that yummy stuff
lilavasa [31]

Answer:

If im not wrong, just multiply wxlxh, for all sides, and you get 1260.

Step-by-step explanation:

5 0
3 years ago
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