You do 2x20 which is basically 2x2 (4) add a zero and your answer is 40
Solution :
We observe that :
But BA is the perpendicular.
From the center B and WX is a chord.
Therefore, TW = TX (perpendicular from the centre of a circle to a chord bisects it)
Consider Δ BTX,
∠BTX = 90° (BA ⊥ WX)
BT = XT (Δ BTX is isosceles)
Since the angles opposite to equal sides are equal of a triangle arc are equal.
∠BTX = ∠BXT
But in the triangle,
∠TBX + ∠TXB + ∠BTX = 180°
∠TBX + ∠TBX + 90° = 180°
2 ∠TBX = 90°
∠TBX = 45°
From trigonometry, we get
...............(1)
WX = 10
i.e., TX + TW = 10
But TX = TW
2 TX = 10
Tx = 5
BX = radius of circle.
∴
= 7
Therefore, the radius of the circle is 7 units.
We are required to find the average change in weight each month.
The average weight lost each month is 1.4 pounds
<em>Total weight lost</em> = 3.5 pounds
<em>Number of months </em>= 2.5 months
<em>Average weight lost each month = Total weight lost / Number of months</em>
= 3.5 pounds / 2.5 months
= 1.4 pounds per month
Therefore, the average weight lost each month is 1.4 pounds
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its a
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Answer:
the last one : 8/4 < 5/2
Step-by-step explanation: