exam Maths Puzzle Numerical Ability

plot the graph of the equations 2x-3y=6 and 2x+y=-10 and interpret the result.

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exam Other Question

Three times the difference of a number x and 5 Can someone help me out on this?

One day, the temperature at 8:00 A.M. was 47degrees F, and by 1:00 P.M. the temperature was 52 degrees F. What was the hourly rate of temperature change?

Thanks so much,
Ashley