exam Maths Puzzle Numerical Ability

Find an equation of a line through (1,1) and (-2,0)in standard form.

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exam Other Question

I recieved this assignment from my teacher, but I am COMPLETELY confused. It says...

The numbers log(a^(3)b^(7)), log (a^(5)b^(12)), and log (a^(8)b^(15)) are the first three te Martha leaves home at 9:am, bicycling at a rate of 24 mi/h. Two hours later, John leaves, driving at the rate of 48 mi/h. At what time will John catch up with Marth?
I appreciate your help.
Thanks