Answer:
Step 1
Step-by-step explanation:
When you subtract a polynomial in parentheses, you have to remove them from the parentheses first, which Kenisha did right. The problem is that because the numbers are being subtracted, <em>all of the signs switch</em>, which they forgot to do. Step one should look like: 2b² + 3b + 11 <em>- 7b² + 5b - 1</em>
The formula for simple interest is ...
I = Prt
1800 = 11000*r*6
1800/66000 = r = 0.02727... (repeating 27)
The simple interest rate is approximately 2.73%.
Answer:
23
Step-by-step explanation:
4r-10=18
4r=28
4r/4=28/4
r=7
2(7)+9=23