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Answers by Alexandra Karla P.

please help (answer)

we first need to bring both fractions to the same denominator, so we will multiply the first one by x+4.   (because (x-4)(x+4)=x^2-16)    (x-6)(x+4)/(x^2-16) + 16/(x^2-16)=0   (x-6)(x+4)+16=0 (if a fraction is equal to 0, the numerator...

find answer (answer)

log in base 2 of x = y   if we rewrite the expression in exponential form:   2^y= x so x is 2^(1212...)

1) 31+ 0.16m=47.96 .16m=16.96   m=106 miles b)   2) y=18x-x^2 is a parabola that opens down with a maximum at its vertex.   The x coordinate of the vertex is -b/2a where a b c are the coefficients of the polynomial y=ax^2+bx+c In our case...

Let's start with f(x).   f(x)=(9x+2)/3x  with a domain of all real number except 0.   (we cannot have 0 at the denominator)     In order to find out the inverse, set the function =y, and solve for x   (9x+2)/3x=y/1   Let's...

Parabola help (answer)

As I've mentioned in the previous problem, the general equation of a parabola that opens up or down is:   y=a(x-h)^2+k   If a is positive, it'll open up. If a is negative, it'll open down.   a.The vertex, (h,k) is in our case (2,-1)   b.The...

Hi, Jarod!   The vertex form of a parabola that opens either up or down is:   y=a(x-h)^2+k where (h,k) is the vertex of your parabola.      If a is positive the parabola will open up/to the right, and if a is negative it will open down/to...

I assume you are asking about the point-slope form of the equation. Let's first calculate the slope:   m=(y2-y1)/(x2-x1)=(-5-5)/(-1-0)=-10/-1=10     <-slope   The point slope formula is:   y-yp=m(x-xp) where P(xp, yp) is a point on our...