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Sphinxa [80]
2 years ago
7

What is the value of the second quartile (Q2) of the data set?

Mathematics
1 answer:
Alekssandra [29.7K]2 years ago
7 0
45, 51, 52, 58, 61, 63, 66, 72, 74

You're trying to find the second quartile (Q₂), and to find that, you must find the median, and then find the median within the second half of the median :)

Median (Middle Number) : 61

Now, look at 61, and look at 74. What is the median of those numbers in this set?

Q₂ = 66

So, your quartile 2 is 66.

~Hope I helped!~
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Find the roots. 2x 2 + 7x - 15 =0
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So you always want to pull out the gcf first but since there isn't one, we can move on.
so we can make an acb chart which is multiplying the a value and the c value and find factors that of that product that will equal the b value.
a value is 2
c value is -15
b value is 7
-30 factors to equal 7 = 10, -3
10 - 3 = 7
so the factors 10 and -3 work. 
so now you make 2 separate parenthesis with one of the factors and one x. and it should be set equal to 0.
(x+10)(x-3) = 0
now solve for x in each separate parenthesis. 
x = -10 
x = 3
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hope this helps
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Step-by-step explanation:

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