I just did the first one but I don't know is it correct
Answer:
The laws of pemdas say that exponent must come first.
The greatest number of sets would be 20 with one girl and one boy in each.
Answer:
<h3>x = (-2)</h3><h3>y = 2</h3>
Step-by-step explanation:
2x + 3y = 6________( 1 )
-3x + 5y = 10_______( 2 )
( 1 ) × 3 ---- 6x + 9y = 18_____( 3 )
( 2 ) × 2 ---- -6x + 10y = 20_____( 4 )

y = 2 ,

Dude I don’t think using this for an exam is it but ok