to find area, multiply base x height, or length x width
In this case:
(x + 4)(x + 3)
Solve by foiling.
(x + 4)(x + 3) = x² + 3x + 4x + 12
Simplify
x² + 3x + 4x + 12 = x² + 7x + 12
x² + 7x + 12 is your answer
hope this helps
Answer:
(x,y)=(-4, -1) so to answer your question, x is -4
Step-by-step explanation:
Answer:
The answers are in the question.
Step-by-step explanation:
The wording can be off-putting but the answers are mostly there for you. It says that when the wind was at the tail of the plane, the travel was hastened to 5 hours instead of six. Is the rate of speed with the wind in favor of the plane is r+21, then it stands to reason that traveling AGAINST the wind will cause the rate to drop to r-21. Taking the average of the two travel times (5 and 6 hours each), we get 5.5 hours. Since speed is distance divided by time, the speed of the plane in still air will be <em>d</em> / 5.5
Be sure to label the speed as mph.