At a certain restaurant, 9 sandwiches and 4 burritos will cost $69.00. In addition, 10 sandwiches and 7 burritos cost $87.40. Assuming that we are talking about the same sandwiches and burritos, what is the
cost of 1 sandwich? What is the cost of 1 burrito? Let x represent the cost of a sandwich and y represent
the cost of a burrito.
Equation #1:
Equation #2:
Cost of 1 sandwich: $
Cost of 1 burrito: s

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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

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.