exam Maths Puzzle Numerical Ability

A company borrowed $1500. It must make monthly payments of $40.50 for 42 months to pay off the loan. Use the constant ratio formula for APR to find the annual percentage rate.

YIkes! Please help

Ellen

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exam Other Question

Could someone help me to solve
2x^2+3x-1 using the quadratic formula which is -b+-(sqrt)b^2-4ac/2a

Thanks so much for your help in advance!
Please help me to solve.

State which method should be applied as the first step for factoring the polynomial.
6x3 + 9x

should I find GCF first, group the terms or use the ac (trial and error) method? thanks for your time.