Answer:
3
Step-by-step explanation:
First right out all the data in numerical order from left to right.
2, 2, 2, 3, 4, 5, 7
The median is the middle number in the set. If there is an even amount of data points, find the average of the two middle numbers. If there is an odd number of data points, like in this data set, just take the middle number as you median.
There are 7 data points in this set so the fourth number in the set written in numerical order would be your median.
When writing this set out in numerical order, repeated numbers must be repeated, we find that the fourth, or middle, number is 3. Therefore, 3 is the median of this data set.
Start with
![-2x-4 < 3x+21](https://tex.z-dn.net/?f=%20-2x-4%20%3C%203x%2B21%20)
Add 2x to both sides:
![-4 < 5x+21](https://tex.z-dn.net/?f=%20-4%20%3C%205x%2B21%20)
Subtract 21 from both sides:
![-25 < 5x](https://tex.z-dn.net/?f=%20-25%20%3C%205x%20)
Divide both sides by 5. Since it is positive, we don't have to change the inequality sign:
![-5 < x](https://tex.z-dn.net/?f=%20-5%20%3C%20x%20)
So, the answer is ![x > -5](https://tex.z-dn.net/?f=%20x%20%3E%20-5%20)
Answer: bob will take a while
Step-by-step explanation:
Answer: a) AB =
; b)
; c) No, they are different; d) No, they are never the same;
Step-by-step explanation:
a) A =
, B =
. This multiplication is possible, because matrix A has 2 columns and matrix B has 2 rows. When those value are equal, the multiplication is possible.
AB =
.
=
b) BA =
.
=
c) As, we can see, parts a and b are differents.
d) With matrices, multiplication is not commutative, which means AB≠BA
Answer:
The two numbers are 9 and 3.
Step-by-step explanation:
x+y=12
x-y=6
---------
2x=18
x=18/2
x=9
9-y=6
y=9-6
y=3