exam Maths Puzzle Numerical Ability

(sqrt of b)-4=-1. what does b =? Thank you again for any help you can provide me with.

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exam Other Question

Use the quadratic formula:

2x^2 - 5x = 3

Can someone please explain this type of problem to me, thank you so much! kevin has $9,300 to invest. He decides to invest a portion of the $9,300 at 4.7% for 1 year and the rest at 5.9% each for 1 year. It the total interest amount that kevin earns is