Find the mean
33.35
35.54
34.45
36.44
Correct answer is C
12+47+49+15+43+41+13+39+43+41+3611
= 37911
= 34.45
Find the lower quartile
12
13
15
20
Correct answer is C
Rearranged: 12,13,15, 36, 39, 41, 41, 43, 43, 47 and 49
Lower quartile or First quartile = totalnumberofitems4
If odd: items numbers + 1 → 11items+14
= 124
Lower quartile = 3rd iems →15
y < -10
y < -2
y < 2
y < 10
Correct answer is B
multiply both sides by the LCM
12 x y+24 - 12 x y−13 >12 x 1
3[y+2] - 4[y-1] > 12
3y + 6 - 4y + 4 > 12
-y + 2 > 12
-y > 12 - 10 = 2
y < -2
39º
80º
110º
141º
Correct answer is B
The exterior angle theorem states that the measure of each exterior angle of a triangle is equal to the sum of the opposite and non-adjacent interior angles. ∠M = ∠R + ∠N → 141 = 41 + ∠N ∠N = 141 - 41 = 100º ∠QNR = 180 - 100 → 80º
2[1+3m]
2[1-3m]
2[1-3m2]
2[1+3m2]
Correct answer is B
2−18m21+3m = 2[1−9m2]1+3m
2[1−3m][1+3m]1+3m
2[1-3m]
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