Answer:
180
Step-by-step explanation:
all I did was multiply
i don’t know hope this is correct if not let me know so I can fix my mistake
You can download the app photo math and that will help you
Answer:
I think it is -24t+20 if you want to simplify
Step-by-step explanation:
For this case, the first thing we are going to do is assume that all the tests are worth the same.
Then, we define a variable:
x: score of Mona's last test
We write now the inequality that models the problem:

From here, we clear the value of x:
Answer:
the lowest grade that Mona can get for her last test so that her test average is 90 or more is:
x = 87
Y = k/x
13 = k/6
k = 78
y = k/x
8 = 78/x
8x = 78
x = 78/8
x = 9.75