Answer:
78
Step-by-step explanation:
6(2x² - 5) = [?] if x = -3
6(2(-3)² - 5)
6(2(9) - 5)
6(18 - 5)
6(13) = 78
Answer:
800
Step-by-step explanation:
In order to get the new population of bacteria in <em>690 minutes</em>, you have to know how often the bacteria will divided in the time frame. So, you have to <em>divide </em><em>690 minutes </em><em>by </em><em>230 minutes.</em>
- 690 min. ÷ 230 min. = 3 times
The bacteria wil<u>l double its colony 3 times in 690 minutes</u>.
- <em>First division:</em> 100 x 2 = 200 bacteria
- <em>Second division:</em> 200 x 2 = 400 bacteria
- <em>Third division:</em> 400 x 2 = 800 bacteria
Therefore, the population of bacteria will be 800 in 690 minutes.
I got 5 times 45 because I multiplied by 5 to get my answer.
Step-by-step explanation:
A) 4(3) + 2 = 14
True
B 3(5) - 8 = 7
False
C 2 - 10 = - 8
False
D 6 - 2(7) = 6 - 14 = - 8
True