exam Maths Puzzle Numerical Ability

please help me thank you in advance I really do not understand this problem.

solve the system by graphing

4x + 2y = 10
y=4

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exam Other Question

Is there a formula for answering this problem?
The coordinates are (-1,2),(-10,-1). Find two points that can cut the segment into three parts with equal length. I have sent you several math questions and have not heard back from you, why?
Shirley