Since

we know our function is

.
To solve, substitute the given value:
Answer:
y(x) = 4x - 5
Step-by-step explanation:
A dependent variable depends on other factors that are measured . The value of a dependent variable depends on the independent variable. The independent variable stands alone and it does change by the other variable you are trying to measure. Independent variable are usually denoted as x.
The function can be represented below.
y(x) = 4x - 5
x = independent variable
y = dependent variable
y depends on the value of x
Answer:
11). x = 25.8°
12). x = 67.3°
Step-by-step explanation:
11). By using sine rule in the given triangle,
cos(x) = 
cos(x) = 
x = 
x = 25.84
x ≈ 25.8°
12). By applying tangent rule in the given triangle,
tan(x) = 
tan(x) = 
x = 
x = 67.29°
x ≈ 67.3°
They had $80 then they cut the price. so 216-80=136
136/2=68
68+20=88
they sold 88 tickets