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galina1969 [7]
3 years ago
12

Evaluate 16 - 20 - (-8) - 9. -21 -5 -12 -1

Mathematics
2 answers:
otez555 [7]3 years ago
8 0
The answer is -5 because :
16-20= -4
-4- -8= 4 bc when the minuses are next to each other it's like you are adding so -4+8=4
4-9=-5


Answer -5
Alla [95]3 years ago
3 0

Answer:

B) -5

Step-by-step explanation:

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Answer: 304.6°

Step-by-step explanation:

First of all, using the circumference of the circle formula to find the radius of the circle.

Circumference of the circle = 13, ie

2πr = 13,

r = 13/2π ---------------------------- 1

Now getting the radius of the circle now, you now substitute for this in the formula for finding the length of an arc to get the central angle.

Arc length = 11 , ( 2πr0°/360) or (πr0°/180), so

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Now solve for 0°, the central angle of the angle by making it the subject of the formula.

πr0° = 180 x 11

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Now, put equation 1 in equation 3 and solve.

0° = 1980

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= 3960/13

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Please be meticulous and understand the way I change the r in the denominator. It was the rule in fraction when dividing.

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