Answer:
19
Step-by-step explanation:
f(x) = 2x^2 + 1
Let x= 3
f(3) = 2 * (3)^2 +1
Exponents first
= 2 * 9+1
Then multiply
= 18+1
Add
= 19
Option D. 2(n + 9) is the right answer
Step-by-step explanation:
The word problems are converted into mathematical problems to solve simply.
for the given problem
"two times the sum of a number and 9"
Let n be a number then
when there is and between two things they are performed first then next operation is performed so
the sum of a number and 9

Then
two times the sum of a number and 9

Hence,
Option D. 2(n + 9) is the right answer
Keywords: Mathematical notation
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Answer:

Step-by-step explanation:
Answer:
<h2>neither</h2>
Step-by-step explanation:
If AB an CD are parallel, then their slopes are the same.
If AB and CD are perpendicular, then the product of their slopes is equal -1.
The formula of a slope:

Calculate the both slope:


The line AB and line CD are not parallel

The line AB and line CD are not perpendicular.
Answer:
Step-by-step explanation:
x^2-6=0
x^+6=0 ( add six to both sides)
x^2=6
x= the square root of 6 ( to get rid of the exponent you have to do the opposite....which is the square root)
x=2.44948974278
You may have to round if not given the exact number.