exam Maths Puzzle Numerical Ability

can you plese help me solve this problem please?
The sales price of a car is $12,590, which is 20% off the original price. What is the original price?

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exam Other Question

I need help...the instructions are Find the distance between P and Q.

P (4,9); Q (9,21)

Can someone help me out? Thank You!
factor by grouping

10x^2 - 12xy + 35xy - 42y^2