Answer:
A) .9423
Step-by-step explanation:
The chance of getting at most 13 heads is 0.9423
2y is in the first equation so if you change 0.5x+y=17 to y=17-0.5x and then double it to 2y=34-x, you can substitute and find x. And then you can find out y.
How to find x:
0.5x+y=17
y=17-0.5x
2y=34-x
3x-2y=8
3x-34-x=8
<u>x=21</u>
How to find y (with previous info.)
x=21
3x-2y=8
3*21-2y=8
63-8=2y
55=2y
<u>27.5=y</u>
Answer:
385 are math quetions.
Step-by-step explanation:
70% of 550 is 385.
Answer:
-9/5; -1 4/5; -1.8
Step-by-step explanation:
