Jake's final grade in his science class is calculated by finding the mean of his scores for six project reports. The score Jake
received on his first five reports are 66,80,88,82, and 72.
What is the lowest-possible score jake can earn his last report in order to have at least an 80 for his final grade?
What is the lowest-possible score jake can earn his last report in order to have at least an 80 for his final grade?
1 answer:
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Let's call the number we're looking for . We know that
is twice as much as
.
Twice as much as a number simply means the double of that number, and in turn the double of a number means to muliply that number by 2.
So, in order to obtain , you have to multply
by 2. In formula, you have
or simply