18 - (-f) = 91
Subtracting a negative value changes to addition:
18 + f = 91
Subtract 18 from both sides:
F = 73
Answer:
f = 73
Step-by-step explanation:
Solve for f
18 - ( - f ) = 91
18 - 18 + f = 91 - 18
2(4x− 9) = 5(x − 4)
=>8x- 18= 5x-20
=>8x-5x= -20+18
=>3x = -2
=>x= -2/3
exact form: 5/2
decimal form: 2.5
mixed number form: 2 2/1
(4,7)
Let's put more details in the figure to better understand the problem:
Let's first recall the three main trigonometric functions:
For x, we will be using the Cosine Function:
Therefore, x = 8√2.
For y, we will be using the Sine Function.
Therefore, y = 8√2.
x = 22