Answer:
x-2
Step-by-step explanation:
10y = 90
y = 9
6x + 5(9) = 90
6x + 45 = 90
6x = 45
x = 7.5
Answer : last option
x = 7.5, y = 9
no it is not compact in R
19 :4.14 dollars each
20:90.30 dollars
10000ha=1m²
=(1000m/1000)²
=1km²/1000²
1ha=1km²/1000² ×1/1000
8.6ha=8.6×1km²/1000² ×1/1000