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
Answer:
280
Step-by-step explanation:
5 story problems ->$14
100 story problems -> ?
100÷5=20
20x14=280
Answer:
7-4+6=7 + 2
Step-by-step explanation: