Answer:

Step-by-step explanation:
Angles<em> </em><em>Y</em> and <em>X</em> form a <em>linear pair</em>, therefore you use the Linear Pair Theorem to solve for <em>x</em>:
![\displaystyle 180° = [2s - 4]° + [s + 91]° → 180° = [87 + 3s]° → 93 = 3s; 31 = s](https://tex.z-dn.net/?f=%5Cdisplaystyle%20180%C2%B0%20%3D%20%5B2s%20-%204%5D%C2%B0%20%2B%20%5Bs%20%2B%2091%5D%C2%B0%20%E2%86%92%20180%C2%B0%20%3D%20%5B87%20%2B%203s%5D%C2%B0%20%E2%86%92%2093%20%3D%203s%3B%2031%20%3D%20s)
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Let’s assume the point in the centre is the origin of the circle.
This means the radius is 21/2 = 10.5cm.
180 - 168 = 12 degrees as the angle between BC.
Circumference of a sector is:
Angle/360 • pi • diameter
=12/360 • pi • 21 cm
= 2.19 cm = 2.20 cm
Which is option B
Answer:
-45.46
Step-by-step explanation:
Answer
2
Step-by-step explanation:
(reorder terms)
<u>2x + 2x</u> = 8
collect like terms
<u>4x=8</u>
divide both sides of the equation
x = 2
Answer:
See below
Step-by-step explanation:
Lets assume weight is input and time is output
The function based on the input and output values is close to linear and it is decreasing (graph is attached)
<u>Answers are</u>
- a) correlation is negative as time decreases with increase in weight.
- b) Numeric value is obtained -0.99 by using the formula attached as picture. It is 'very strong negative relationship'
- c) Yes. Because weigh increase causes time to decrease