40 is an acute angle.
30 is an acute angel.
110 is an obtuse angle.
The easiest way to remember is anything below 90° (which is a right angle) is acute (think, cute = small). Anything above 180° is obtuse.
Answer:
Option C
Step-by-step explanation:
Consider the function f ( x ) = 3x^2 + 4;

Now if this graph were to be translated 7 units down, considering the function was f ( x ) = 3x^2, the new graph would be f ( x ) = 3x^2 - 7. The same concept is applied to the graph f ( x ) = 3x^2 + 4;

* Note that a translation doesn't effect the rate with which the graph changes, it only effect's it's position on the coordinate plane
<em>Hope that helps!</em>
21+(5f)=61
Subtract 21 to both sides of the equation
5f=40
Divide both sides by 5
f=8
The answer is 8