exam
Maths Puzzle
Numerical Ability
How are -1/2cos2x and 1/2sin^2x equal? Or in other words, how do we reconcile the two?
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exam Other Question
Solve each of the equations for x.
Section 10.1 # 22
25x^2=13
Section 10.1 # 32
2(x-5)^2=3
Section 10.1 # 42
x^2+4x+4=7 (hint: factor the left-hand side)
35. solve each systems of equations algebraically
x+8y=0
-x+y=-9