Answer:
(1) Let the ratio be x
4x + 6x + 8x = 90
18x = 90
x = 90/18
x = 5
(2) (i). -16/2
(ii) -24/3
(iii) -32/4
(iv) -40/5
(4) 2(x+3) = x+7
= 2x + 6 = x + 7
2x - x = 7 - 6
x = 1
(2). q/4 - 7 = 13
= (q - 28) / 4 = 13
= q - 28 = 13×4
q - 28 = 52
q = 52 + 28
q = 80
(5) Two Pair of Complementary Angles = 60°, 30° and
45°, 45°
Two Pair of Supplementary Angles = 90°, 90° and 100°,80°
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Answers & Comments
Answer:
(1) Let the ratio be x
4x + 6x + 8x = 90
18x = 90
x = 90/18
x = 5
(2) (i). -16/2
(ii) -24/3
(iii) -32/4
(iv) -40/5
(4) 2(x+3) = x+7
= 2x + 6 = x + 7
2x - x = 7 - 6
x = 1
(2). q/4 - 7 = 13
= (q - 28) / 4 = 13
= q - 28 = 13×4
q - 28 = 52
q = 52 + 28
q = 80
(5) Two Pair of Complementary Angles = 60°, 30° and
45°, 45°
Two Pair of Supplementary Angles = 90°, 90° and 100°,80°