23. norman and suzanne scarpulla own 35 shares of mcdon
ald's stock and 69 shares of the ohio art company stock
(makers of etch a sketch and other toys). on a particular
day in 2015, their stock portfolio consisting of these two
stocks was worth $4000. the mcdonald's stock was $92
more per share than the ohio art company stock. what
was the price of each stock on that day? (source: yahoo
finance)
30.

the balance is found at the link

step-by-step explanation:

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.