David has a bag that holds 18 pens. 5 of the pens are ball point, 4 are gel pens and 9 are felt tip marker pens. he reaches into the bag to pull out one pen. if every pen has an equal chance of being pulled out of davids bag, what is the probability that he will pull out a gel pen

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

y + 11 = (1/4)(x + 16)

step-by-step explanation: