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In your Math Class, you have the scores of 68, 82, 87, and 89 on
the forst four of five tests. To get a grade of B, the average of
the first five test scores must be greater than or equal to 80 and
less than 90. Find the range of scores you need on the last test to
get a B.

Respuesta :

Answer:I need to score between 75 and 100 to get a B.

Step-by-step explanation:

To get the number I must score in the 5TH Test, the total of the first four test is added together

68+82+87+89 = 326

However making the number I must score X

There is need to find a new average

And the total number of score is now equal to 5, so we generate the equation.

(326 + X)/5=80

326+X= 400

X= 400-326

X= 74

However he needs to score equal or above 74 and 100 to get a B.