6+3+5+7= 21 balls total
Choose 2 balls
21C2= 210 total number of ways you could have chosen the two balls
(nCr- n=total, r=choose)
Total green balls= 3
You choose first green ball out of 3
3C1
Then you choose second green ball out of the 2 green balls left
2C1
Multiply these two outcomes
3C1•2C1= 6
Probability=
6/210= 1/35
Well, to prove two triangles congruent by ASA, you have to figure out how two angles and a side of the triangles are congruent. So if you were to prove ∠R =∠U, and ∠T = ∠W, you would just have to prove that one of each of the sides were congruent. Sorry I couldn't help more.
Hope this helps! :)
Answer:
Over a 22 seconds, the altitude will be: 924 feet
Step-by-step explanation:
- Let 'x' be the time in seconds
As the altitude of an airplane is decreasing at a rate of 42 ft per second.
Thus, the expression to find the altitude at x seconds is:
y = 42x
so at x = 1 sec, y = 42 feet
Now, putting x = 22 seconds to determine the altitude at 22 seconds
y = 42x
= 42(22)
= 924 feet
Thus, over a 22 seconds, the altitude will be: 924 feet
Let be M the set of the real numbers less thant 69
so we write it as follow M = { x∈R / x ∠ 69}
