exam
Maths Puzzle
Numerical Ability
7x^2+6x - 9x^2-3
My answer is -2*x^2+6*x-3. Is this correct?
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exam Other Question
A certain radioactive element decays to 1/2 of its original amount every 20 years. If there was 100mg to start with, how much will be present after 200 years? Set up an equation and solve the problem. Can someone please help me ??
betty is thinking of two consecutive integer whose sum is 41. Let x represnt the smaller unknown integer.
a. How could you represnt the larger unknown integer in terms of x?