Answer:
4) y=7-2x
6) 20x+5y=15
5(4x+y)=15
4x+y=15/5
4x+y=3
y=3-4x
8) 6x+8y=-6
2(3x+4y)=-6
3x+4y=-3
y=(-3-3x)/4
10) 16x+9=9y -2x
16x+2x=9y+9
18x=9y+9
18x=9(y+1)
2x=y +1
y=2x-1
Step-by-step explanation:
this is the correct answer
what are the color of the marbles that are not red?
Answer: 40/33
Area of rectangle =height×base
4 1/2×3 3/7=9/2×24/7=216/14=15 6/14=15 3/7
A
