Answer:
Only the firsts and fourth choices ( and )
Step-by-step explanation:
Turn the equation into words:
"A number plus 9"
"Multiplied by "
"Is equals to -18"
Distribute to find the second equation:
Answer:
a) 0.0016
b) 0.0224
Step-by-step explanation:
If every question has 5 possible answers, the probability of getting the correct answer by guessing would be 0.20. The probability of getting an incorrect answer would be 0.80.
a)Find the probability she lucks out and answers all four questions correctly.
To do this, Allison would have to guess right the first, second, third AND fourth answers. Therefore, we have to multiply the probabilities:
0.20 x 0.20 x 0.20 x 0.20 = 0.0016
The probability that she answers all 4 questions correctly is 0.0016.
b) Find the probability that she passes the quiz.
To pass the quiz, she has to have three OR 4 correct answers:
- The probability that she has 3 correct answers is: 0.20 x 0.20 x 0.20 x 0.80 (since she has to have 1 correct answer and 1 incorrect one) = .0064.
- We already calculated the probability that she guesses 4 answers correctly: 0.0016.
Now, we have to sum up these two scenarios:
0.0064 + 0.016 = 0.0224.
Thus, the probability that she passes the quiz is 0.0224
Answer:
42
Step-by-step explanation:
to find out the triangle do this formula:
bxh/2
3.5x3=10.5
3.5x3=10.5
21
To find out rectangle do:
lxw
7x3=21
21+21=42
Answer:
1. answer is the first one "See you!"
2. answer to the second one is "como se dice"
3. answer for the third one is "canyon"