Answer:
$2.80
4(.50) + 1(.80)
2 + .80 = 2.80
Step-by-step explanation:
No cause 2x +1 =26 so bye Felicia
The amplitude is |-3| = 3.
The period, T, is obtained from
(2*pi)/T = 2
T = pi
From the calculator, the first positive zero is approximately x = 0.85
Algebraically:
The cos function takes a minimum of -1 and a maximum value of +1.
Therefore y can be at most -3 or +3.
This makes the amplitude = 3.
The general expression for the sinusoidal function is
y = Acos((2*pi)/T + b) + k
Therefore, find T from the equation
(2*pi)/T = 2 => T = pi.
In this problem, you combine the like terms...
4a - 3b + 7a
4a and 7a are like terms so you add them together.
4a + 7a = 11a
So, the answer is: 11a - 3b