Step-by-step explanation:
Mark me as brilliant plzzz
To find the mean, add all the values and then divide the sum by how many values you added. In this case, if the teacher drops the lowest score (68) that would leave 5 values. So,
90 + 83 + 88 + 74 + 80 = 415 < this is the total of all (minus the lowest) or Lorenzo's test scores. Now take this number, and divide it by 5 (because we added five tests together):
415 / 5 = 83 < this is the new mean, and also his percentage grade.
Answer: 83
Alternatively, you can list the grades from least to greatest, and cancel one value from each side until you get to the middle.
Answer:
-65 is your answer
Step-by-step explanation:
What you do is you divide -3 to both sides.
195/-3=-65.
-65 is your answer.
Answer:
9 x 2 + 7x
18 + 7x - 6
18 - 6 = 12
12 + 7x
Is your simplified expression
Sounds like rearranging to me:
P=2(a+b) -- expand brackets
P=2a+2b -- subtract 2a
P-2a=2b -- divide by 2
b=(P-2a)/2
