A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have an average of 77?
72 ,91 ,78, 72
The minimum grade he must get on the last test in order to have an average of 77 is
(Simplify your answer.)

72 is the minimum grade he must get on the last test in order to have an average of 77.

Step-by-step explanation:

The grades of a student are given 72,91,78,72 and the grade of his last test is not given.

The term average is defined as the sum of all the data in a set divided by the number of data in a set.

Here, the number of data is 5. (Because the students has 4 grades plus one grade for his last test).

The average he should get is 77.

Average = Sum of all grades / number of grades

Let, 'x' be the grade of the last test.

⇒ 77 = (72+91+78+72+x) / 5

⇒ 77 = (313+x) / 5

⇒ 385 = 313 + x

⇒ x = 385 - 313

⇒ x = 72

The minimum grade he must get on the last test is 72.

no one knows lol

step-by-step explanation:

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076