Answer:
She got 5 incorrect.
Step-by-step explanation:
In order to find this, we start by using the formula for percentage.
Correct/Total = Percentage
Now we put in known quantities.
Correct/25 = .8
Now to solve we multiply both sides by 25
Correct = 20
Since she got 20 correct, we know she got 5 incorrect
Answer:
200 is equal to 20 tens I guess lol

36 + x = 144
144-36= 108
square root of 108 is, around 10.4
Answer:
x = -2
y = 3
Step-by-step explanation:
-5x + 3y = 19
x = 3y - 11
-5x + 3y = 19
-5(3y - 11) + 3y = 19
-15y + 55 + 3y = 19
-15y + 3y + 55 = 19
-12y + 55 = 19
-12y = 19 - 55
-12y = -36
y = -36/-12
<u>y = 3</u>
x = 3y - 11
x = 3(3) - 11
x = 9 - 11
<u>x = -2</u>