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27.06.2019 •
Mathematics
You have 15 pennies in your pocket. of those pennies, 2 are canadian. suppose you pick a penny out of your pocket at random. find p(not canadian).
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Ответ:
86%
Wouldn't you just be finding the ratio of pennies to Canadian.
Step-by-step explanation:
The amount of pennies to Canadian pennies are 13/15
And the amount of Canadian pennies to pennies are 2/15
If you pick a random penny out of your pocket it would be a larger possibility to get the regular pennies.
So the ratio would be I think:
There would be an 86% more chance of grabbing a regular penny than the 13% chance of getting a Canadian penny.
Ответ:
The measure of angle TRV is 130° ⇒ last answer
Step-by-step explanation:
* According to the attached graph
- Line TRW intersects line SRV at point R
- The measure of angle VRT is (2x + 10)°
- The measure of angle VRW is (x - 10)°
- We need to find measure of angle TRV
- From the attached figure
∵ T , R , W lie on the same line
∴ ∠TRW is a straight angle
- The measure of the straight angle is 180°
∴ m∠TRW = 180°
∵ ∠TRW contains ∠VRT and ∠VRW
∴ m∠VRT + m∠VRW = m∠TRW
∴ m∠VRT + m∠VRW = 180°
∵ m∠VRT = (2x + 10)°
∵ m∠VRW is (x - 10)°
∴ 2x + 10 + x - 10 = 180
- Add like terms
∴ 3x = 180
- Divide both sides by 3
∴ x = 60
∵ m∠TRV = (2x + 10)°
- Substitute x by 60
∴ m∠TRV = 2(60) + 10 = 120 + 10 = 130°
∴ The measure of angle TRV is 130°