exam Maths Puzzle Numerical Ability

graph the following equations and give the points

y=2x , y=2x+1

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exam Other Question

Sam must have an average of 70 or more in his summer course to obtain a grade of C. Her first three test grades were 75,63, and 68. Write an inequality representing the score that Sam must get on the last test to get a C. If x to the second= x to the third, give the two possible values for x