exam Maths Puzzle Numerical Ability

Solve the porportion

12. 42/10 = 21/y

Any help with this equation would be Greatly</b> appreciated.

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exam Other Question

I have a problem on one of my quiz' for my pre-algebra class. I think I am solving the problem correctly but I am unsure because we have not done many problems like this yet. I h Write the equation of the line that passes through (-2,5) and (7,10)