Answer:
Yes, she is correct.
Explanation:
21 has the following factors; 1,3,7,21 and 21 is not a factor of 56 so the GCF is 7.
21/3 is 7 and 56/8 is 7 therefore the expression is also correct.
Answer:
Given that your friend in not really psychic, he has a probability of P=1.5% of guessing right 15 out of 20 coin flips.
Step-by-step explanation:
We have a binomial distribution problem.
We have to calculate the probability of correctly guessing 15 out of 20 flips of a coin (probability of success for every trial: p=0.5).
We can calculate that with the binomial distribution formula:
Then we can conclude that, given that your friend in not really psychic, it has only 1.5% of guessing right 15 out of 20 coin flips.
Answer:
x=5
Step-by-step explanation:
Step 1: Subtract 2x from both sides.
4x−3−2x=2x+7−2x
2x−3=7
Step 2: Add 3 to both sides.
2x−3+3=7+3
2x=10
Step 3: Divide both sides by 2.
x=5
And theres our answer.
Hope this helped! :)
Answer:
The money she start with is <u>$25</u>.
Step-by-step explanation:
Given:
Vanessa spent 4/5 of her money at the bookstore.
In total, the books cost $45.
Now, to find the money she start with.
Let the money she start with be .
Money spent at the bookstore .
Total books cost = $45.
According to question:
⇒
Adding the variables we get:
⇒
<em>Multiplying both sides by 5 we get:</em>
⇒
<em>Dividing both sides by 9 we get:</em>
⇒
Therefore, the money she start with is <u>$25</u>.
Answer: The show ended at 11:15. Hope this helps
Step-by-step explanation: