Which expression is equivalent to (StartFraction x Superscript negative 4 Baseline y Over x Superscript negative 9 Baseline y Superscript 5 Baseline EndFraction) Superscript negative 2? Assume x not-equals 0, y not-equals 0. StartFraction y Superscript 8 Baseline Over x Superscript 10 Baseline EndFraction
StartFraction x Superscript 5 Baseline Over y Superscript 7 Baseline EndFraction
StartFraction x Superscript 5 Baseline Over y Superscript 4 Baseline EndFraction
StartFraction x Over y Superscript 7 Baseline EndFraction

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

asdsad

step-by-step explanation:

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

i honestly dont know