Question

(A) Two complementary angles are in the ratio 2 : 7. Find the angles.
(B) If the mean of x, x+2, x+4, x+6 and x+8 is 16 find the value of x.
35o
45o
x
y
x 125o
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(C) For the following data, construct a frequency distribution table.
35, 36, 36, 34, 37, 37, 36, 35, 35, 36, 36, 37, 35, 36, 36, 34, 36, 35, 34, 37, 37,
36, 35, 34 and 35 also state the range of the numbers?
(D) Construct the following angles, using a ruler and compass only.
(i) 120o
(ii) 45

Answer 1

Step-by-step explanation:

1) ratio=2:7

let 2x be La.

let 7x be Lb

complimentary angles are the angles whose sum is 90°

hece, 2x+7x=90

9x=90

x=10

hence, La=2x=20°

Lb=7x=70°

2) mean= sum of terms/number of terms

mean = 16 (given)

m= x+(x+2)+(x+4)+(x+6)+(x+8)/5

16 = 5x + 20/5

16= 5( x+4)/5

16 = x + 4

x= 12

3) refer the attached pic.

4) refer the attached pic.

I hope this helps.

plz marke as brainliest.