18-the correct number should be 20.
First put them in order:11, 12, 13, 15, 16, 26, 26.Then use your fingers the numbers at the opposite ends:11, 12, 13, 15, 16, 26, 26.Then keep moving in11, 12, 13, 15, 16, 26, 26.11, 12, 13, 15, 16, 26, 26.Until you come to the middle:11, 12, 13, 15, 16, 26, 26.So the median is 15.
(13 + 15 + 26 + 11 + 26 + 16 + 12)/7 = 17 ====
11 15 16
Let's label one of the numbers with x, and the other number with y. So, x + y = 25 4x - 12 = 2y + 16 add 12 and subtract 2y to both sides of the second equation; x + y = 25 4x - 2y = 16 +12 multiply by -4 the first equation; -4x - 4y = -100 4x - 2y = 16 +12 add both equations in order to eleminate x; 0 - 6y = -72 multiply by -1 to both sides; 6y = 72 divide by 6 both sides; y = 12 Substitute 12 for y into the first equation; x + y = 25 x + 12 = 25 subtract 12 to both sides; x = 13 Thus, the numbers are 13 and 12. Check: 13 + 12 = 25 4(13) -12 = 2(12) +16 ? 52 -12 = 24 + 16 ? 40 = 40
18-the correct number should be 20.
16+13+12+929+12+941+950
of course you can hun! it doesnt matter about age does it?
Mean = (15 + 12 + 16 + 13)/4 = 56/4 = 14
First put them in order:11, 12, 13, 15, 16, 26, 26.Then use your fingers the numbers at the opposite ends:11, 12, 13, 15, 16, 26, 26.Then keep moving in11, 12, 13, 15, 16, 26, 26.11, 12, 13, 15, 16, 26, 26.Until you come to the middle:11, 12, 13, 15, 16, 26, 26.So the median is 15.
The mean of those numbers is equal to 12.916 recurring (that is, 12.91666....)
No
12
16
13
13/13 + 12/14 = 13/7 or 16/7
13/16 3+9=12 4+8=12 12 is divisible by 3 39/3=13 48/3=16 13/16 can not both be divided by the same number (13 is a prime number)