Answer:
80%
Step-by-step explanation:
4/5=80% chance of getting one correct
Answer:
54
Step-by-step explanation:
its a sequence. they are multiplying by 3 each time.
The equation 3x+1/2=4
meaning x would equal 7/6
The mistake was when she multiplied the 2nd equation by 5, she forgot to also multiply that last number 10 by 5 as well.
correction :
5x + 3y - z = 15
-x + 2y + 3z = 10...multiply by 5
---------------------
5x + 3y - z = 15
-5x + 10y + 15z = 50 (result of multiplying by 5)
--------------------add
13y + 14z = 65
