Everything is divisible by five, so pull out five
5(-k^2+4k-6)
Answer: 368
Step-by-step explanation: 80 divided by 5 is 16, so you would use 16 to find out how many students there are. To do that, you have to do 23 times 16, which is 368. Hope this helps!
Answer:
2.7930 × 
Step-by-step explanation:
1.9 × 105 × 140 = 27,930
Scientific notation: 2.7930 × 
In a triangle, the total angle is 180 degrees. A straight line is always 180 degrees. With this in mind, the following can be obtained:

These are simultaneous equations.

Answer:
A^-1:B^-1
Step-by-step explanation:
im not 100% sure but i think this is the right answer :)