Amy tutors math. For each hour that she tutors, she earns 30 dollars. Let E be her earnings (in dollars) after tutoring for H hours.

Write an equation relating E to H. Then use this equation to find Amy's earnings after tutoring for 13 hours.

Equation:
Amy's earnings for 13hour :dollars

e = 30h 390 dollars after 13 hours

Step-by-step explanation:

e = earning

h = hours worked

e = 30h

30×13=390

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204