When is a rhombus a square?

a. when its angles are convex angles
b. when its angles are right angles
c. when its sides are parallel
d. when its sides are congruent

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Are the corresponding angles congruent? explain why or why not.