Answer:
a) 
, 
, 
, , b) , , 
,
Step-by-step explanation:
a) The equation must be rearranged into a form with one fundamental trigonometric function first:
Value of x is contained in the following sets of solutions:
,
,
b) The equation must be simplified first:
Value of x is contained in the following sets of solutions:
,
,
Answer:
24
Step-by-step explanation:
Mean = Sum / number
Mean = (8 + 6 +4) / 3
= 18 / 3
= 6
Mean = 6
Answer:
answer is (14x+6) hope it helps
Hello!
10 seconds to return to the ground.
7 seconds to reach 576 feet above the ground.
Find the amount of time taken to reach the ground by setting the equation equal to 0:
0 = -16t² + 80t + 800
Factor out -16 from the equation:
0 = -16(t² - 5t - 50)
Factor the terms inside of the parenthesis:
0 = -16(t - 10)(t + 5)
Find the zeros:
t - 10 = 0
t = 10
t + 5 = 0
t = -5
Time can only be positive in this instance, so the correct answer is 10 sec.
Find the time by substituting in 576 for the height:
576 = -16t² + 80t + 800
Subtract 800 from both sides:
-224 = -16t² + 80t
Rearrange:
0 = -16t² + 80t + 224
Simplify:
0 = -16(t² - 5t - 14)
0 = -16(t - 7)(t + 2)
t = 7 seconds.
