Ranges of grade for variation and quantity
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1) a student must have an average (the mean) on five tests that is greater than or equal to 80% but less than 90% to receive a final grade of B. Devons grades on the first four tests were 76%,63%,91%, and 80%. What range of grades on the fifth test would give him a B in the course? (assume that 100% is the highest possible grade.)
enter the range of grades necessary for devon to earn a B average.
2) solve the inequality. then graph on a number line, where x is a real number.
X+8>4
the solution set is {X|X>?}
3)write the variation and find the quantity indicated. r varies directly as s. find r when s=2 and k=6.
the variation is ?
(type k for the variation constand,do not substitute in values)
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The ranges of grade for variation and quantity are examined. The solution provides a complete, neat and step-by-step solutions are provided in the attached file.
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(1) Let the score required on the last test be x
We want 80 <= (76 + 63 ...
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