y=mx+b is the general formula of linear equation
y=-2x+5+3x+2
y=1x+7
m=1
b=7
9*root25*root5
9*5*root5(room 25 simplifies to 5 whereas root 5 remains as root5)
So you end up with 45root5
10(6+2z)+8 distribute 10
60+20z+8 add like terms
68+20z is answer since you can’t simplify anything further
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