7(2x-5)-(10-3x)
; (14x-5)-(10-3x)
; (17x-5)-10
; 17x-15
Answer:
120.3
Step-by-step explanation:
51 + 69.3 = 120.3
2x - y = 1
y = 2x -1
slope = 2
perpendicular slope = -1/2
y = mx + c
y = -1/2 + c
at point (3,2)
2 = -1/2 (3) + c
c = 2 + 3/2
c = 7/2
y = -1/2 x + 7/2
y + 1/2x = 7/2
2x - y = 1 ------------------- (1)
y + 1/2x = 7/2 -------------(2)
(1) + (2):
2x + 1/2x = 1 + 7/2
5/2 x = 9/2
5x = 9
x = 9/5 ---- sub into (1)
2x - y = 1
2(9/5) - y = 1
18/5 - y = 1
y = 18/5 - 1
y = 13/5
Ans: x = 9/5, y = 13/5
R - 18 = 50
r = 50 + 18 = 68
Hence Rick is 68 yrs old
The equation in standard form would be,
All you have to do is move -2/7x to the other side.
Hope this helped
:D