Answer:
x = -5
Step-by-step explanation:
Start by adding the 5x to each side of the equation to the left to get...
-25 = 5x + 25 + 5x
Then you would add 25 to each side of the equation to get...
0 = 10x + 25 + 25
Adding on, you would simplify this step to get...
0 = 10x +50
You would now have to make the x variable on one side alone so you would subtract 50 from both sides of the equation again to get...
-50 = 10x
Finally you would divide both sides of the equation by 10 to get x alone...
-50/10 = 10x/10
And simplify that to get...
x = -5
Step-by-step explanation:
Dogs: 12% of 45= 5.4
Cats: 24% of 45= 10.8
Fish: 36% of 45= 16.2
Other: 28% of 45= 12.6
Answer:
The tip is $3.92. The total bill is $23.54.
Step-by-step explanation:
I simply used a calculator to find the answer. It's just basic multiplication for the tip and addition for the total bill.
The answer is P=7 hope this helps
Answer:
And using a calculator, excel ir the normal standard table we have that:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
Solution for the problem
Let's say that X represent the random variable "incomes in a certain large population of college", and we know that the distribution for X is:
We select 16 teachers and we are interested on the sample mean or average, and we know that the distribution for the sample mean is given by:
And we are interested on this probability:
And we can use the z score given by:
And using a calculator, excel ir the normal standard table we have that: