X^4-81 =
(x^2-9)(x^2+9) =
(x+3)(x-3)(x^2+9)
There are two real roots (at x=3,-3).
Answer:
35 degrees.
Step-by-step explanation:
In order to find an angle in a triangle we need to know the other two angles, because the angles in a triangle all add up to 180 degrees. So, knowing two will get us the other one. In this case, we know two angles. One of them is 55, and the other, since it is a right triangle, is 90. So the two angles we know are 55 and 90. Using that all angles in a triangle add up to 180, we can use
55 + 90 + x = 180
145 + x = 180
x = 35
Answer:
An inch is greater than a centimeter.
Step-by-step explanation:
we know that
Average Rate of Change. is the change in the y-value divided by the change in the x-value for two distinct points on the graph
So
in this problem
substitute the values in the formula above
Divide by 
both numerator and denominator
therefore
the answer is
Answer:
A. 10%
Step-by-step explanation:
First calculate how much percentage is in one dollar, which is 5% per dollar, then times that by how much money is deducted which is $2, and you will get your answer 10%.
Hope this helps good luck!
