X= 9th student test score
Add the 9 test scores and divide that total by 9 to equal the average.
(56 + 92 + 78 + 64 + 85 + 83 + 91 + 77 + x)/9= 78
add in parentheses
(626 + x)/9= 78
multiply both sides by 9
626 + x= 702
subtract 626 from both sides
x= 76
ANSWER: 76 is the score needed by the 9th student for a mean of 78.
Hope this helps! :)
We know that to angle A coresponding side a and to angle B corespond side b so there given that to angle A with measure of 30 degree corespond the side length of side a = 2 but from this given details that side b has length equal 2 so from this reasult that the measure of angle B is equal 30 degrees too same with angle A
10 - 2(7)
10 - 14 = -4
A is the answer
Answer: 28
Step-by-step explanation:
7 days of per week. Two times a day. Two minutes. 14 times per week, two minutes every time. 28 minutes per week.
Answer:
2
Step-by-step explanation:
a(2,1) means the item of 2nd row and 1st column.
Column is seen vertically and row is seen horizontally.
