In trapezoid PQRS, . Let X be the intersection of diagonals . The area of triangle PQX is 20, and the area of triangle RSX is 45. Find the area of trapezoid PQRS.

125

Step-by-step explanation:

In the diagram below; we have four triangles

Triangle

PRX; QSX; PQX; RSX

Let;

Δ PRX =

Δ QSX =

Δ  PQX =  = 20

Δ PQX =  = 45

∴

is also parallel to  : as such, =

∴ =

= 20 × 45

= 900

=

= 30

The area of the trapezoid is equal to T

T =

T = 30 + 30 + 20 + 45

T = 125

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.

The answer would be (c)