12-15=3 ............................................................
Answer: x = 3
Step-by-step explanation:
9 - 2x = 4x - 9
18 -2x = 4x
18 = 6x
x = 3
Answer:
540 miles
Step-by-step explanation:
60 miles per 1 hour
120 per 2 hours... etc.
multiply 60 and 9 to get 540
Just plug in what x is in f(x) which is given f(7) into the equation.
f(x) = 2x - 5
f(7) = 2(7) - 5
f(7) = 14 - 5
f(7) = 9
hope this helps, God bless!
To find the length of the missing side x, use Tan trigonometric formula
Tan: 
Tan 21 = 
Tan 21 ×
=
×

x=27.4
X= 27.4 ft
Hope it helps!