Answer:
x
21
Step-by-step explanation:
(-2/3)x+13≥ -1
(-2/3)x≥ -14 (I subtracted by 13 on both sides)
x
-14*(-3/2) (I divided by -2/3 on both sides)
x
21
Answer:
They can make 10 different groups of three.
Step-by-step explanation:
The order in which the people are in the car is not important, so we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

How many different groups of three can the five of them make?
Combinations of 3 from a set of 5. So

They can make 10 different groups of three.
It should be D, I did the math :)
Answer:
( 2 - x )^2
Step-by-step explanation:
Answer:
1000 *
Bacteria after 18 hours,
Step-by-step explanation:
The condition given in the problem is that the number of bacterial triple after every 2 hours.
So, after 2 hours, total bacteria= 1000 * 3
So, after 4 hours, total bacteria= 1000 * 3 * 3
Therefore, the general format for the number of bacteria is 1000 *
, where n is the number of times the bacteria has tripled.
In 18 hours, there are
ties that the bacteria has tripled.
Therefore, the no. of bacteria after 9 hours= 1000 * 