Tamia and Grant at the end of 30 year mortgage would pay $252,791.25 in interest on their urban condo, Tamia and Grant could
also choose a 15 year mortgage at 3.75% which results in a $490.33
mortgage payment. How much more will Tamia and Grant
pay
for
the house if they choose the 30 year mortgage? (Do not take any tax
advantages into consideration.)

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

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im not sure

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guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

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