Answer:

Step-by-step explanation:
Open the brackets.



Answer:
89
Step-by-step explanation:
Given that Wendy took 2 tests and scored, 77 and 80 respectively, let x represent the grade of Wendy's third test.
To get an average grade of 82, let's generate an equation to find x (Wendy's grade on her third test).
Average grade = sum of all 3 grades all over 3


Multiply 3 by both sides


Subtract 157 from each side of the equation


Wendy must score 89 on her third test to have an average of 82.
3 + 2k
This is because multiplying by 1/5 is like dividing each term by 5
X = -0.25 and x = -2^-2
I’m not sure if this helps
<span>2divided 5 =</span>0.4
if 2 is over the 5 you divide the 2 by 5 to get the decimal and then you get 0.4/