Answer:
the third one ig
Step-by-step explanation:
You should all the numbers up, then divide by how many numbers there are. 80.2 would be reasonable. If you want you could round it more.
Answer:
c. (y + z = 6) ⋅ −3
Step-by-step explanation:
We want to use elimination to eliminate y in a system of equations
y + z = 6
3y + 4z = 1
We can take the first equation and multiply by -3 to make the y term -3 so when we add the equations -3y + 3y =0
-3(y + z = 6)
3y + 4z = 1
--------------------
-3y -3z = -18
3y + 4z = 1
---------------------
0y +z = -17
Which of the following groups of numbers are all prime numbers? A. 2, 3, 5, 9 B. 2, 5, 15, 19 C. 3, 11, 23, 31 D. 7, 17, 29, 49
pav-90 [236]
The correct answer is C: 3, 11, 23, 31. Each of these numbers has only two factors.
Why not A, B, D?
A - 9 is not a prime number (it has three factors: 1, 3, 9).
B - 15 is not a prime number (it has four factors: 1, 3, 5, 15).
D - 49 is not a prime number (it has three factors: 1, 7, 49).
It goes in to it 11.5 times.