Answer:
14x + 5 = 31
x= 13/7
2x - 3y = -29
=2x - 3y +29 =0
Step-by-step explanation:
14x + 5 = 31
first step move the +5 to the other side beside the 31 it will become -5
Then subtract the numbers 31-5 =26
14x=26
Divide both sides by 14
x= 13/7
Formula used = (a + b) (a - b) = a² - b²
Answer:
-14z^2-5zw+5z-2w^2+6w
Step-by-step explanation:
2z(4w+3z-5)-(2w+5z)(1w+4z-3)
8zw+6z^2-10z-\left(2w+5z)(w+4z-3)
8zw+6z^2-10z-20z^2-13zw+15z-2w^2+6w
-14z^2-5zw+5z-2w^2+6w
Answer:
P(2)=0.256
Step-by-step explanation:
We know that Nancy has noticed that 20 trucks pass by her apartment daily (24 hours). We conclude that for 1 hours, pass 20/24=5/6 trucks.
We calculate how many trucks pass for 3 hours:
3 · 5/6= 15/6=2.5=λ
We use a Poisson distribution:
P(k)=\frac{λ^k · e^{-λ}}{k!}
For 2 trucks we have that is k=2. We know that is λ=2.5
We caclulate the probability
P(2)=\frac{2.5² · e^{-2.5}}{2!}
P(2)=0.256
75 fihbfdkhbskdj bidsh d9u dissregard that it had to be 20 characters sooooooooooo