exam Maths Puzzle Numerical Ability

Carol has 18 coins with a total value of $3.45. If the coins are dimes and quaters, how many of each kind are there?

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exam Other Question

evaluate the determinate:

3 -1 1 2
-2 0 0 0
2 -1 -2 3
1 4 2 3
when a baseball player practiced batting for 350 hours his RBI went from .235 to .250.
a. what is the rate of change?

b. if this rate stays constant how many hours must he prac