Answer:
2x+3+5x+6 = 7x+9
Step-by-step explanation:
2x + 3 + 5x + 6
= 2x + 5x + 3 + 6
= 7x + 9
Hope it helps
Answer:
Step-by-step explanation:
We have to note that there are 4 kings in a deck of 52 cards.
This makes the probability of choosing a king the first time .
We now know that we can choose another king from the deck, but it's important to note that it's not a chance. We now only have 51 cards in the deck, and 3 kings left. This means the probability of choosing a king now is .
To find the probability of doing both these, we need to multiply the fractions.
Hope this helped!
Answer:
Step-by-step explanation:
105.5x100/120=87.91so 100-88 = 22%
Answer:
10
Step-by-step explanation:
First, we need to find the sum of the 15 consecutive numbers. The formula to finding the average of a set of numbers is the sum of the terms divided by the number of terms. So to find the sum, you do 15x15 because the average is 15 and there are 15 numbers. 15x15=225, so you know the sum of the consecutive numbers is 225. Let X be equal to the first consecutive number of the 15 consecutive numbers.
X+(X+1)+(X+2)+(X+3)....+(X+14)=225
=15X+(105)=225
=15X=225-105
=15X=120
=X=8
So the first consecutive number of the 15 is 8. Therefore, the second consecutive number is 9, the third is 10, and so on. The question asks for the average of the first five numbers, which is 8, 9, 10, 11, and 12.
The summation formula is .
So the sum of the first five consecutive numbers is 50. Since there are 5 numbers, you do 50÷5=10. Therefore, the answer is 10.