exam Maths Puzzle Numerical Ability

I have $30 in my drawer consisting of dimes and quarters. Write an inequality that shows the different number of coins in my drawer.

.25x + .10y < $30


Is that all that is needed for a question like that?

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exam Other Question
a ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. when will the ball reach a height of 80 m? Solve each problem. Use your choice of methods.


x + y = -4

4x + y = -13

y + 3z = -10