5х – 4 y = -10
3х + 2y = 16

x= 2, y= 5

Step-by-step explanation:

5x -4y= -10 (1)

3x +2y= 16 (2)

(2) ×2:

6x +4y= 32 (3)

(1) +(3):

5x -4y +6x +4y= -10 +32

11x= 22

x= 22 ÷11 (÷11 on both sides)

x= 2

Substitute x= 2 into (2):

3(2) +2y= 16

6 +2y= 16

2y= 16 -6

2y= 10

y= 10 ÷2

y= 5

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

1/2*qr*rs

step-by-step explanation: