Answer:
(x+5)²-10x²
Step-by-step explanation:
USing the completing square method
x² +25
= (x)² +2(x)(5) +(5)² -10x²
=(x+5)²-10x²
Answer:
16 students got an A
Step-by-step explanation:
Set up an equation to compare the ratio to the scores:
![\frac{2}{5} = \frac{x}{40}](https://tex.z-dn.net/?f=%5Cfrac%7B2%7D%7B5%7D%20%3D%20%5Cfrac%7Bx%7D%7B40%7D)
Cross multiply:
80 = 5x
Divide each side by 5:
x = 16
Now, check if ![\frac{16}{40} = \frac{2}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B16%7D%7B40%7D%20%3D%20%5Cfrac%7B2%7D%7B5%7D)
16/8 = 2
40/8 = 5
The ratios are the same! Therefore, 16 students got an A!
Hope this helps! Feel free to contact me if you have any questions :)
Answer:
An equation would be 24 - 14 = n. Another one you could write would be 14 + n = 24. The answer is 10 for the amount of old trees.
Answer:
F $35,000
Step-by-step explanation:
3,500 is 7% of 50,000 3500 multiplied by 10 years= 35,000