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Maths Puzzle
Numerical Ability
add and simplify
y over y^2-49 + 7 over y^2+8+7
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book Other Question
{2a+3b=12
{5a-b=13 please help me ,,,,thank you
sin x=1/4 and 0 < (or equal to) x < (or equal to) pie/2, the cos x=?
1. square root 7/ 4
2. Square root 15/ 4
3. 3/4
4. 1/ square root of 15
5. 1/ square root of 17