Solve the system by substitution. check your solution.
a- 1.2b = -3
0.25 +0.6a = 12
a. (15, 15)
b. (10, 12)
c. (13, 12)
d. (7,9)
select the best answer from the choices provided
oa
ob

Shania is correct.

Step-by-step explanation:

For a right angled triangle, given two sides and an angle, we can use the sine rule or the various trigonometry identities to solve the triangle;

a/sin A = b/sinB

and

sin (angle) = opposite side/hypotenuse

cos (angle) = adjacent side/hypotenuse

tan (angle) = opposite/ adjacent

assuming a is the opposite side of angle A and b is also opposite of angle B

Otherwise, the only way to solve a triangle given two sides only is by the use of the Pythagoras theorem.

Hence, Shania is correct.