exam
Maths Puzzle
Numerical Ability
Tina can run 12 mi in the same time it takes her to bicycle
72 mi. If her bicycling rate is 20 mi/h faster than her running rate, find each
rate.
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exam Other Question
(-6a3b4)2
(x + 9)(x - 9)
(3x - 7)2
(3x + 6)(4x - 7)
please simplify these above problems thanks bunches
I am not sure if I am doing this right. Solve for K.
a/b=b/a+1/k
(bak) a/b=(bak)b/a+1/k(bak)
a^2k=b^2k+ba
a^2k-b^2k=ba
k(a^2-b^2)=ab
k=ab/a^2-b^2