Answer:
Step-by-step explanation:
problem 13:
12g+24, 3(4g+8)
problem 14
9a+6, 3(a+2)+6a
6(a+1)+3a
Answer:
honestly im trying to figure it out right now will get back to you when i figure it out.
Step-by-step explanation:
ANSWER
The radius is 4
EXPLANATION
The given equation is:
We complete the square to get the expression in standard form:
We factor using perfect squares to get:
This implies that,
Comparing to
The radius is r=4
Complete question :
In the evening, the temperature is 2828 degrees. By midnight it has dropped 3131 degrees lower. Between midnight and 4 am, it goes down 66 more degrees. Then, by 9 am, the temperature goes up 3030 degrees. Find the final temperature.
Answer:
-38°
Step-by-step explanation:
Evening temperature = 28°
By midnight = 31° lower
4am = 66° lower
9 a.m = 30° higher
Temperature at midnight :
28° - 31° = - 2°
Temperature at 4 a.m:
-2° - 66° = - 68°
Final temperature at 9a.m :
-68° + 30° = - 38°
The temperature at 9a.m is - 38°
cos(-240°) = cos 120°; the "adjacent sides" and the "hypotenuses" are the same in both cases. The supplement of 120° is 60°, and 60° is a positive acute angle. Since cos(-240°) is negative, we need to write
cos(-240°) = -cos(60°).
Check: cos(60°)= 1/2, so - cos(60°) = -1/2, which is the value of cos(-240°).