yam78
26.07.2019 •
Mathematics
Which event is most likely to occur? a. flipping a fair coin, with sides labeled heads and tails, and the coins landing on tails. b. choosing a marble out of a bag, with face labeled one to six, and the cube landing on a number less than six . c. rolling a fair number cube, with faces labeled one to six, and the cube landing on a number less than six. d. spinning the arrow on a spinner, with four equal sector labels one to four, and the arrow landing on a number greater than one
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Ответ:
2-Probability 5/6
3-Probability 5/6
4-Probability 3/4
maybe you mistyped 2 but those are the probabilities for each with what the question says
Ответ:
∠RQT = 23.5
∠PQR = 133°
Step-by-step explanation:
Question 1Step 1 - Add angles together:
As all angles on a straight line must add up to 180°:
3x - 5 + x + 1 = 180
Add like terms together
3x + x - 5 + 1
4x - 4 = 180
Step 2 - Add 4 to both sides of the equation:
4x - 4 + 4 = 180 + 4
4x = 184
Step 3 - Divide both sides by 4:
x = 46
∠RQS = x + 1
∠RQS = 46 + 1
∠RQS = 47
Given the ray QT bisects ∠RQS, the angles must be the same on either side so:
47 ÷ 2 = ∠RQT
∠RQT = 23.5
Question 2As we know the value of x:
∠PQR = 3x - 5
Plug known values in:
3x - 5
3(46) - 5
138 - 5
∠PQR = 133°
This can also be calculated by subtracting known angle ∠RQS from 180:
180 - 47 = 133.
Hope this helps!