book Maths Puzzle Numerical Ability

Write in simplified radical form by rationalizing the denominator.

Square root of 3 minus 2 over(/) -5 square root of 3 + 8

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book Other Question

7. The sum of two numbers is 17 and the sum of their square is 145. Find the larger number.
a. 10 b. 11 c. 8 d. 9 e. none
The answer is D, but how? Please help me prepare for my A ball is thrown downward from a window in a tall building. Its position at time t in seconds is s=16t^2(32t), where s is in feet. How long (to the nearest 10th) will it take the b