2x² - 4x - 30
2(x²) - 2(4x) - 2(15)
2(x² - 4x - 15)
To find the number of years between 1844 to 2015 you have to subtract.
Lets say that x is the # of years in between 1844 and 2015
Then we have:

After doing the subtraction using a calculator or a pencil and paper, you get that:

So 171 years have passed from 1844 to reach to 2015.
X=4
You have to distribute the negative sign for everything in the parentheses. After that you add x to the other side then add 8 to the opposite side to move them. Then your answer is 4.
Answer:
110 have a good one
Step-by-step explanation:
22x5 is 110
Step-by-step explanation:
Convert the speeds of Amir and Ryder to meters per second (m/s).
Amir:
8260 mm/s = 8.260 m/s
Ryder:
930 cm/s = 9.30 m/s
9.30 m/s > 8.260 m/s, so:
Ryder ran approximately 1 meter per second faster than Amir.