exam
Maths Puzzle
Numerical Ability
I need help in answering,what is [x+y4] for x =4 and y = 8 the answer I got was 3 is that right. the 4 belongs under the x+y
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exam Other Question
The average age of Amtrak passenger train cars is 19.4 years. If the distribution of ages is normal and 20% of the cars are older than 22.8 years, find the standard deviation.
please help
Use substitution to solve for x and y
3x - y = 3
y = 2x - 1