Point a and point b are placed on a numberline. point ais located at -20 and point b is 5 less than point
1 answer:
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Answer:
A
Step-by-step explanation:
So we have the two functions:
And we want to find:
This is the same as:
So, to find the answer, find g(1) first:
Now, substitute this value for g(1):
And plug this into f(x):
Therefore:
Our answer is A
Answer:
(i) The name of the part of the circle, OQ is a radius
(ii) The radius of the sector QOR is 21 cm
Step-by-step explanation:
The given figure is a sector of the circle O
∵ Any sector of a circle formed from 2 radii and an arc
∴ OQ is a radius
(i) The name of the part of the circle, OQ is a radius
The rule of the length of an arc of a circle is L = × 2 π r, where
- α is the angle of the sector
- r is the radius of the circle
∵ The length of the arc QR is 22 cm
∴ L = 22
∵ The measure of the angle of the arc is 60°
∴ α = 60°
∵ π =
→ Substitute them in the rule above
∵ 22 = × 2 ×
× r
∴ 22 = r
→ Divide both sides by
∴ 21 = r
(ii) The radius of the sector QOR is 21 cm