Answer:
B.) 18
Step-by-step explanation:
To find the correct b value we use this formula
b² - 4ac = 0
b = What we are solving for
a = 1
c = 81
b² - 4(1)(81) = 0
b² - 324 = 0
b² = 324

b = ±18
And 18 is one of the answer choices
So B.) 18 is the correct answer.
Step by step explanation = 76
Answer:
6/3=2
Step-by-step explanation:
its very easy pls give brainliest
M=230
m-80=150
add 80 to each sides
Answer:
40%
Step-by-step explanation:
In order to find percent, you can set up the fraction 2/5 to the equation x/100.

Then solve using algebra to cross-multiply.



so the answer is 40%.