: 1) If you were going to solve these, you would set them up like this. s+p=19 7s+10p=121 among the choices, b is the only one that is equivalent to one of these equations 2) The problem looks a little confusing. If the price is per box then they easily make $275. 8b+9h=53 20*8b+30*9h=275 If it's per batch, the answer is B. 3. x^2+y^2=16 y=x+4 solve the first equation for y y=√16-x^2 x+4=√16-x^2 (x+4)^2=16-x^2 x^2+8x+16=16-x^2 2x^2+8x=0 2x(x+4)=0 x=0 or x=-4 (be carefull i copyed and pasted the answer)