Write 2 system of equations for this question? ?
several guys went to eat lunch at subway
and bought four cold drinks and seven
subway sandwiches for $21.60. joseph and
his date had two cold drinks and three
subway sandwiches. if the sandwiches cost
twice as much as the cold drinks, how much
was joseph's bill?

x=30

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