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2 years ago

12

Last week, Rohana bought a new computer for 10% off the advertised price. The advertised price was $1,800. How much did Rohana h

ave to pay for the computer?

1 answer:

oee [108]2 years ago

6 0

10% of 1800 is 180. If she payed 180 ten times it would be 1800 dollars. The computer is 180 dollars off. 1800-180= 1620. She pays $1620

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sertanlavr [38]

Sum of all exterior angles = 360°

Size of one exterior angle = 40°

Number of sides = 360 ÷ 40 = 9

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Answer: There are 9 sides to this polygon.
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Answer:

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There are multiple shortcuts which you could make here, FYI:
Instead of splitting the middle, if your a value is 1, you can go straight to that step (x+number)(x+other number).
Whenever you have a difference of squares, like a²-b², that factors to (a+b)(a-b).

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