Question

The angles of a triangle are x, y & 40. The difference between the angle x & y is 300
Find 5x+7y.​

Answer 1

Answer:

440

Step-by-step explanation:

x + y + 40° = 180° [ Sum of all angles of a triangle is 180° ]

x + y = 180° - 40° = 140 --------------- Equation 1

x -  y = 300 ---------------------Equation 2 [ Given ]

Adding equation 1 and 2;

    x + y = 140

(+) x - y  = 300

2x = 440

x = $\frac{440}{2}$

x = 220

Putting value of x = 220 in equation 2

x - y = 300.

220 - y = 300

-y = 300 - 220

-y = 80

y = -80

5x + 7y

(5 X 200) + (7 X -80)

1000 + (-560)

1000 - 560

440.......(Ans)