So far, a student has earned the following scores on four 100-point tests this grading period: 65, 73, 81, and 82. What score must the student earn on the fifth and last 100-point test of the grading period to earn an average test grade of 80 for the five tests?

99

Step-by-step explanation:

Given:

A student has earned the following scores on four 100-point tests

65 73 81 82

Average grade of total five test = 80

Question asked:

What score must the student earn on the fifth and last 100-point test of the grading period to earn an average test grade of 80 for the five tests ?

Solution:

Let score earned in fifth test =

By using average formula:

Now, according to the question

Average grade of total five test = 80

Sum of all observation by tatal num. of observation = 80

=

Multiplying both side by 5

Subtracting both side by 301

Therefore, he must score 99 to earn an average test grade of 80 for the five tests.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )

with btw u said 100pts but it clearly says

i answerd and just got 10pts

no hate