Approximately 8 out of every 25 families in the united states own dogs. if you asked 90 families, about how many of them would you expect to own dogs?

28.8

Step-by-step explanation

8/25 families own dogs.

8/25  *  90 = 720/25 = 28.8

What do you do with the 0.8? I would say that since this is a statistic, you leave it for 2 reasons.

I know it is impossible to have 0.8 families, but it will have more significance as the sample approaches the general population. According to the census taken in 2017, there are 126.22 million households in the United states. Written in expanded form, that would be 126,220,000 families.

If you take that as your base and use 8/25 as the number with dogs, you come to 8/25 * 126,220,000 = 1009760000/25 = 40390400

The point I'm trying to make is that the 0.8 we were concerned about, no longer exists.

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

isocolese triangle

we know that the line connect a and b is the hyptonuse

so first find the hypotonuse length using the distance formula, call the length c

since it is an isocolese triangle, the lengths of the legs are the same

using pythagorean theorem,

in this case, a=b since isocolese triangle so we get

or

we can find c so we can find the distances

we know that if we draw 2 circles, each has center at a and b, and find where they intersect, we can the 2 possible locations for c

if a has center at (xa,ya) and b has center at (xb,yb), then we can solve where

and

intersect to find where they intersect

i'm not going to put an example because i have to go to class. i hope this explanation is enough