exam Maths Puzzle Numerical Ability

Evaluate. (6)(-5) + 2

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exam Other Question

Suppose Charlie O'Brian hits a baseball straight upward at 150ft/sec from a height of 5 ft.

1) Use the formula to determine how long it takes the ball to return to the earth.
solve for the indicated variable: (x-2y+xz)/(x-z)=4y SOLVE FOR X can you give me a step by step guide to solving this, because i am completely lost