Is 3+9=12 9+3=12 a sentence for commutative property of addition

1 answer:

6 0

Yes, it is.

The commutative property means the numbers can " commute ", they can move.....3 + 9 = 12 : 9 + 3 = 12....does not matter the order of the numbers, they still equal the same

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In the xy-plane above, o is the center of the circle, and the measure of ∠aob is π a radians. what is the value of a ?

andre [41]

The complete question in the attached figure

we know that
tan ∠AOB=opposite side angle ∠AOB/adjacent side angle ∠AOB
opposite side angle ∠AOB=1
adjacent side angle ∠AOB=√3
angle ∠AOB=pi/a radians
so
tan (pi/a)=1/√3---------> tan (pi/a)=√3/3

we know that
tan 30°=√3/3
30° is equal to pi/6 radians
and
angle (pi/a) belong to the I quadrant
so
(pi/a)=pi/6
a=6

the answer is
a=6

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Please help me outt

Musya8 [376]

Answer:

see explanation

Step-by-step explanation:

The scientific notation is 3.212 · 10^8

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2 years ago

Find the area of a sector with a central angle of 170° and a diameter of 9.1 cm. Round to the nearest tenth.

deff fn [24]

The area of the circle is calculated through the equation,
A = πr²
where A is the area and r is the radius. An alternate equation can be used,
A = πD²/4
where D is the diameter.

Substituting the known value to the equation,
A = π(9.1 cm)² / 4
A = 65.03 cm²

The area of the sector, As, is calculated by multiplying the area of the circle by the ratio of the angle to the whole revolution.
As = (65.03 cm²) x (170°/360°)
As = 30.71 cm²

The answer to this question is therefore letter B.

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you made $14.91 per hour

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3 years ago