exam Maths Puzzle Numerical Ability

(-3-5)sqrt2+(-4-2)sqrt2 this is supposed to add up to sqrt100 and then into 10 how is this problem done?

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exam Other Question

i also need #16 answered also same chapter, and we are working on rational expressions i NEED HELP IN THESE PROBLEMS DEALING WITH MONEY CAN SOMEONE HELP ME PLEASE.

Problem #1

I have to find the simple interest. Assuming a 360-day year. Round result.

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