466.
A.
6
B.
8
C.
7
D.
5
Correct answer is C
(2 x 4) + (3 x 4) + (4 x y) = 48
8 + 12 + 4y = 48
4y = 48 - 20
\(\frac{4y}{4}\) = \(\frac{28}{4}\)
y = 7
467.
Calculate the perimeter of a sector of a circle of raduis 12cm and angle 60o.
A.
(12 + 4\(\pi\))cm
B.
(24 + 4\(\pi\))cm
C.
(12 + 6\(\pi\))cm
D.
(24 + 6\(\pi\))cm
Correct answer is B
Perimeter = 2r + \(\frac{\theta}{360}\) x 2\(\pi\)r
= 2(12) + \(\frac{60}{360}\) x 2 x \(\pi\) x 12
= (24 + 4\(\pi\))cm
468.
A.
(k +p)2
B.
(k - p)2
C.
k2 + p2
D.
k2 - p2
Correct answer is B
k2 - 2kp + p2 = (k - p)2
469.
A.
17
B.
22
C.
20
D.
16
Correct answer is D
No of visitors = 10 + 5 + 1 = 16
470.
Calculate the range of 20, -6, 25, 30, 21, 28, 32, 33, 34, 5, 3, 2, and 1.
A.
32
B.
36
C.
33
D.
40
Correct answer is D
Range = 34 - (-6) = 34 + 6 = 40
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