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3 years ago

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Mathematics

1 answer:

DedPeter [7]3 years ago

5 0

Answer:

For every 15 students scoring in the 60's there were 9 students scoring in the 70's.

Step-by-step explanation:

Your first step would be to rewrite the numbers into an easier to understand form like fractions, 45/3 and 27/3. Then you divide both numbers by 3, so you get comparable numbers. 45/3= 15, 27/3=9.

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If 4 : 9 is equivalent to (5x+13) : 63, then what is the value of x?

Aleksandr [31]

$\large{\underline{\underline{\pmb{\sf{\color{yellow}{Answer:}}}}}}$

The value of x is 3

Step-by-step explanation:

$\textsf{\underline{\large{To find :-}}}$

The value of x

$\textsf{\underline{\large{Given :-}}}$

4 : 9 = (5x + 13) : 63

$\textsf{\underline{\underline{\large{Solution :-}}}}$

we can write this as

$\sf \frac{4}{9} = \frac{(5x + 13)}{63}$

Now we will cross multiply the values

$\sf 4 \times 63 = 9(5x + 13) \\ \\ \sf 252 = 45x + 117 \\ \\ \sf 252 - 117 = 45x \\ \\ \sf 135 = 45x \\ \\ \sf \frac{135}{45} = x \\ \\ \sf \orange {3 = x}$

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2 years ago

Can anyone please help with this?

lapo4ka [179]

Answer:

Yes I can :O

Mean: About 11.87

Median: 11

Mode: 10

Step-by-step explanation:

Mean: Add up all the numbers and divide by the total number of numbers

<em>*deep breath in haha*</em>

6+7+7+8+8+9+9+9+50 (the 10s)+33 (the 11s)+12+12+12+12+13+14+14+16+16+17+17+18+18+19=356

356 (total) / 30 (number of numbers) = 11.8666666666666666666666 etc = 11.87

Median: With all the numbers in order, the middle number (if there are two add them together and divide by 2)

Not much to show, just mark them off starting from the outside getting inside, you end up with 11!

- See attached

Mode: Data value that occurs most often, in this case we can see that 10 happened the most

Hope this helps, have a nice day! :D

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