The answer is variant A.
Because:
if the two angles of a triangle are congruent to two angles of the other triangle , this triangles are similar
A^2 + 31 = 155 - I squared each of b and c for those numbers
a^2 = 155 - 31
a^2 = 124
a = 4 * sqrt(31)
The rate is 16 dollars for 9 books and the unit rate is $1.777777778 per book.
Answer:
They need 7 taxis
Step-by-step explanation:
43/7 is 6.14, and since their cant be .14 f a person you have to round up
