Part A)
The coin landed on heads 9 times out of 30 flips, so the experimental probability is 9/30, which reduces to 3/10 probability.
Part B)
Theoretically a coin has a 1/2 probability of landing on heads each flip
Answer:
3/14
Step-by-step explanation:
We want to find the ratio of a to b, or a/b
9/17 = 3a/ (a+b)
Multiply each side by 17
17*9/17 =17* 3a/ (a+b)
9 = 51 a/ (a+b)
Multiply each side by (a+b)
9 (a+b) = 51a
Distribute the 9
9a +9b = 51a
Subtract 9a from each side
9a-9a +9b =51a-9a
9b = 42a
Divide each side by b
9b/b = 42a/b
9 = 42a/b
Divide each side by 42
9/42 = a/b
But we can simplify 9/42 because each is divisible by 3, so divide 9 and 42 by 3
3/14 = a/b
Short Answer B
Remark
The non adjacent angles add up to the given exterior angle.
Equation
The two non adjacent angles are equal and add up to the exterior angle.
Let one of the non adjacent interior angles = x
x + x = 140
2x = 140 Divide by 2
x = 140/2
x = 70
Comment
So the next step is to find the third angle
70 + 70 + x = 180 Combine like terms.
140 + x = 180 Subtract 140 from both sides.
x = 180 - 140
x = 40
Conclusion
The angles = 40 + 70 + 70
Answer
B <<<<
Answer:
A, B, E
Step-by-step explanation:
EC is 12 inches by pthag
AC is 17 becuase EC is 12 and AE is 5. 5+12 = 17
The parameter is 40 as 13 times two plus 5 times two is abt. 40
