Answer:
8.5
Step-by-step explanation:
Do you mean "(a+5)2/3
(a + 5) 2/3 = 9
a + 5 = 13.5
a=8.5
-12/4= -3
2(-3)^2+12(-3)-6=-24
The vertex is (-3,-24)
Answer:
C
Step-by-step explanation:
102.35-20-33.33-52.80+25+24.75
45.97
Answer:
smallest to greatest
9.2x10^-8
5.44x10^-2
5.8x 10^-2
2.4x10^3
Step-by-step explanation:
Answer:
b. Because the probability of being 15 or more correct is 0.0207, it is likely that she is just guessing at the questions.
Step-by-step explanation:
-This is a binomial probability distribution with p=0.5, n=20 and x=15.
The function is expressed as:
![P(X=x)={n\choose x}p^x(1-p)^{n-x}](https://tex.z-dn.net/?f=P%28X%3Dx%29%3D%7Bn%5Cchoose%20x%7Dp%5Ex%281-p%29%5E%7Bn-x%7D)
We calculate the probability of guessing 15 or more correctly:
![P(X\geq 15)=1-P(X](https://tex.z-dn.net/?f=P%28X%5Cgeq%2015%29%3D1-P%28X%3C15%29%5C%5C%5C%5C%3D1-P%28X%5Cleq%2014%29%5C%5C%5C%5C%3D1-0.9793%5C%5C%5C%5C%3D0.0207)
The probability of passing, guessing 15+ correctly, is 0.0207. This probability is very low and it is it is likely that she is just guessing at the questions