Answer:
B.
Step-by-step explanation:
Factor left sides of the equation
(x-1)(x+9) = 0
Set factor equal to 0
x-1 = 0 or x+9 = 0
x= 1 or x= -9
I hope that's help and have sweet dream !
Answer:
<u>x = 14</u>
Step-by-step explanation:
4x + (2x + 6) = 90
6x + 6 = 90
subtract both sides by 6:
6x + 6 <em>- 6 </em>=<em> </em>90 <em>- 6</em>
6x = 84
divide both sides by 6
6x/6 = 84/6
x = 14
double check:
4*14 + (2*14 + 6) = 90
56 + 28 + 6 = 90
Have a nice day!
1. {26, 21, 28, 31, 9, 28, 16, 18, 21, 23, 29, 24, 19, 22, 25, 28}<br>
Find the mean.
meriva
Answer:
368 / 16 = 23
Step-by-step explanation:
Add them all, then divide by how many numbers are in the data set.
Answer:
For this case we know that at the starting year 2000 the population was 9 billion and we also know that increasing with a double time of 20 years so we can set up the following model:
And if we solve for b we got:
And then the model would be:
Where y is on billions and t the time in years since 2000.
And for this equation is possible to find the population any year after 2000
Step-by-step explanation:
For this case we know that at the starting year 2000 the population was 9 billion and we also know that increasing with a double time of 20 years so we can set up the following model:
And if we solve for b we got:
And then the model would be:
Where y is on billions and t the time in years since 2000.
And for this equation is possible to find the population any year after 2000