It should be a positive 5 not a negative so the error was made at the end because u divide
Both are not earning different salaries.
If a study determines the difference in average salary for subpopulations of mechanical engineers and civil engineers is NOT significant, then the subpopulations of mechanical and civil engineers are not earning different salaries.
Study determines that there is not any significant study so thats why both are not earning.
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Answer:
Adult tickets= 390
Student ticket= 410
Step-by-step explanation:
4A + 2.5S= 2585
A+ S = 800
A= 800-S
Substitute into the first equation