Which of the sets of ordered pairs represents a function? A = {(1, -2), (3, -5), (5, 2), (7,5)} B = {(4, 2), (4, -2), (9, 3), (9
alisha [4.7K]
I believe the answer you are looking for is b
The answer is 171.25.
Hope this helped!
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Answer:
14 + 6
Step-by-step explanation:
(4 + 
)(5 - )
Each term in the second factor is multiplied by each term in the first factor
4(5 - ) + (5 - ) ← distribute parenthesis
= 20 - 4 + 5 - 
= 20 - 4 + 5(2 ) - 6
= 20 - 4 + 10 - 6 ← collect like terms
= 14 + 6
Answer:
x = 3, y = -2, and z = 4
Step-by-step explanation:
x + y + z = 5 -2x - 3y + 2z = 8
3x - y - 2z = 3 x + y + z = 5....multiply by 3
---------------------add ----------------------------
4x - z = 8 -2x - 3y + 2z = 8
3x + 3y + 3z = 15
--------------------------- add
x + 5z = 23
4x - z = 8
x + 5z = 23....multiply by -4
---------------------
4x - z = 8
-4x - 20z = - 92 (result of multiplying by -4)
------------------------add
-21z = - 84
z = -84/-21
z = 4 <=====
4x - z = 8 x + y + z = 5
4x - 4 = 8 3 + y + 4 = 5
4x = 8 + 4 y + 7 = 5
4x = 12 y = 5 - 7
x = 12/4 y = -2 <====
x = 3 <====
