8 is b and 9 is b i think.
Answer:
4y^(2)+14y+31
Step-by-step explanation:
First you need to do (y+7)(y+7)
y^2+7y+7y+49
y^2+14y+49
Add it all together
y^2+14y+49+3y^2-15
4y^(2)+14y+31
A=2xy+2xz+2yz
a=2(xy+xz+yz)
a=2(5.5*3.4+5.5*8.25+3.4*8.25)
a=2(18.7+45.375+28.05)
a=2(92.125)
a=184.25 cm^2
Answer:
164
Step-by-step explanation: