$17.80 in 1 hr
$1 in 1/17.80 hr
$675.00 in 675.00/17.80 hr
37.9 hours
Which is 38 hours after rounding it.
Answer:
A) 0.15
B) 0.36
Step-by-step explanation:
First Box consist 1 red pills and 19 blue pills
second box consist 6 red pills and 14 blue pills
Third box consist 2 red pills and 18 blue pills
a) Prob ( randomly chosen pill is red) ![= \frac{1}{3} \times \frac{1}{20} + \frac{1}{3} \times \frac{6}{20} + \frac{1}{3} \times \frac{2}{20}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B3%7D%20%5Ctimes%20%5Cfrac%7B1%7D%7B20%7D%20%2B%20%5Cfrac%7B1%7D%7B3%7D%20%5Ctimes%20%5Cfrac%7B6%7D%7B20%7D%20%2B%20%5Cfrac%7B1%7D%7B3%7D%20%5Ctimes%20%5Cfrac%7B2%7D%7B20%7D)
![\frac{1}{60} (1+6+2) = 0.15](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B60%7D%20%281%2B6%2B2%29%20%3D%200.15)
b)Prob ( 1 reds and 10 blue pilss) =![\frac{1}{3} \frac{^1C_1\times ^{19}C_{10}}{^{20}C_{11}} + \frac{1}{3} \frac{^6C_1\times ^{14}C_{10}}{^{20}C_{11}} + \frac{1}{3} \frac{^2C_1\times ^{18}C_{10}}{^{20}C_{11}}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B3%7D%20%5Cfrac%7B%5E1C_1%5Ctimes%20%5E%7B19%7DC_%7B10%7D%7D%7B%5E%7B20%7DC_%7B11%7D%7D%20%2B%20%5Cfrac%7B1%7D%7B3%7D%20%5Cfrac%7B%5E6C_1%5Ctimes%20%5E%7B14%7DC_%7B10%7D%7D%7B%5E%7B20%7DC_%7B11%7D%7D%20%2B%20%5Cfrac%7B1%7D%7B3%7D%20%5Cfrac%7B%5E2C_1%5Ctimes%20%5E%7B18%7DC_%7B10%7D%7D%7B%5E%7B20%7DC_%7B11%7D%7D)
![= \frac{1}{3} 1.106 = 0.368](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B3%7D%201.106%20%3D%200.368)
We have one of those equations already solved for y, so let's sub that one into the other one and solve the equation in terms of x only:
![2x+( x^{2} -4x+3)=6](https://tex.z-dn.net/?f=2x%2B%28%20x%5E%7B2%7D%20-4x%2B3%29%3D6)
. We will simplify that and at the same time bring the 6 over by subtraction to get a polynomial set to equal 0 that we can factor.
![x^{2} -2x-3=0](https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20-2x-3%3D0)
. We will factor that to get (x-3)(x+1) for x values of x = 3 and x = -1. a above is the choice that has the x values we need, -1 and 3.
Answer:
7 FLowers
Step-by-step explanation:
If you take away 3 from 12, you end up with 9, then you take 2 more away, leaving you with 7 flowers.
A I’m pretty sure. I’m sorry If I’m incorrect.