The predicted time remaining has decreased by 30 years, so the second one would be the answer
7x-4x=10-1
3x=9
3/3x=9/3
x=3
Answer:
3/4
Step-by-step explanation:
divided by 3 to get the answer.
6.4x + 2.8y = 44.4
6.4(3) + 2.8y = 44.4
19.2 + 2.8y = 44.4
-19.2 -19.2
2.8y = 25.2
------ ------
2.8 2.8
y = 9
