40 (x-2y+z) ……………………………….
The question says kilograms every minutes, so it's C or D. The answers on A and B same
Answer:
one
Step-by-step explanation:
3x-5=-x+4
x=9/4
y=7/4
(9/4, 7/4)
(a)
A right angle sums to 90
6x + 4x + 10 = 90
10 x = 80
x = 8
(b) straight line = 180
5x + 13 + 3x + 7 = 180
x = 20
(c) Sum of triangle angles = 180
3x + 5 + 2x + 18 + 2x + 17 = 180
x = 20
(d) Sum of two angles in right angle = 90
90 = x + 30
x = 60
