exam
Maths Puzzle
Numerical Ability
Please help me solve this equation: log2((x^2)+7)=4 (the first 2 is supposed to be small and at the bottom)
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exam Other Question
A boat travels 24 mi upstream in 3 hrs. then it takes 3 hrs to go downstream at 36 mi downstream, Find the speed of boat in still water and the speed of the current. (using two unknowns, write two equations and solve.)
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Can you please help me with this? I have no idea how to work these.
(3x squared - 7x + 5)+(-2x squared + 7x - 8)
(5y squared - 3y + 4)-(3y squared - 7y + 2)