Use the substitution method to solve the system of equations. 3x + 4y = 10
y = x-1
O A. (2,1)
B. (1,2)
C. (3,2)
O D. (2,3)

The answer is A. (2,1)

Step-by-step explanation:

x - 1 = 1

y = 1

3x + 4y = 10

4y multiplied by 1 = 4y

3x + 4y = 10

10 - 4y = 6

3x = 6

6 divided by 3x = 2

x = 2

(2,1)

what i would say the best answer is a. 40.5

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.