Answer:
x = -8
Step-by-step explanation:
4( 3x +5 ) - 3 = 9x -7
Distribute
12x +20 -3 = 9x -7
Combine like terms
12x+17 = 9x-7
Subtract 9x from each side
12x-9x +17 = 9x-9x-7
3x +17 = -7
Subtract 17 from each side
3x+17-17 = -7-17
3x = -24
Divide each side by 3
3x/3 = -24/3
x = -8
It is the same thing as the average you add everything up then you divide by the number of numbers you added together
Answer: 2.4 miles per hour
Step-by-step explanation: just do 7.2/3=2.4
or another way you could do this is do 2.4 x 3=7.2
Answer: 0.21
Step-by-step explanation:
Given: The number of vowels in the bag = 28
The number of consonants= 12
The total number of letters in the bag = ![28+12=40](https://tex.z-dn.net/?f=28%2B12%3D40)
Probability of choosing consonant :-
![P(C)=\dfrac{12}{40}=\dfrac{3}{10}](https://tex.z-dn.net/?f=P%28C%29%3D%5Cdfrac%7B12%7D%7B40%7D%3D%5Cdfrac%7B3%7D%7B10%7D)
After replacement the total number of letters remains same.
Probability of choosing vowel :-
![P(V)=\dfrac{28}{40}=\dfrac{7}{10}](https://tex.z-dn.net/?f=P%28V%29%3D%5Cdfrac%7B28%7D%7B40%7D%3D%5Cdfrac%7B7%7D%7B10%7D)
Now, the probability you will choose a consonant and then a vowel (independent events) is given by :-
![P(C)\times P(V)=\dfrac{3}{10}\times\dfrac{7}{10}=\dfrac{21}{100}=0.21](https://tex.z-dn.net/?f=P%28C%29%5Ctimes%20P%28V%29%3D%5Cdfrac%7B3%7D%7B10%7D%5Ctimes%5Cdfrac%7B7%7D%7B10%7D%3D%5Cdfrac%7B21%7D%7B100%7D%3D0.21)
The common difference is the constant that you get when you get the difference between any term and the one preceding it. In this case:
(3--4)=(10-3)=(17-10)=d=7