exam Maths Puzzle Numerical Ability

Could use any help available. Thanks
(1-10i)-(3+2i)+(2+13i)

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exam Other Question

perform the following operation: v-w=?
where v=8i-6j and w=-2i+4j two cars pas each other traveling in opposite directions on a highway, one is goig 1.5 times as fast as the other. at the end of 3.5 hours they are 192.5 miles apart. find each cars rate.