Algebra: Using Balance Classwork

1. If $x+y=-4$, then $\dfrac{3}{4}(x+4)^2=$?

ANSWER: (D) 12

2. If $x+\dfrac{7}{8}={15}{8}$, then $\dfrac{x+\frac{7}{8}}{16}=$

ANSWER: (B)  $\dfrac{15}{128}$

3. If $y=2-(n-4)$, then $y-5=$?

ANSWER: (D) -(n-1)

4. If $4x+3y=9$, then $16x+12y=$?

ANSWER: 36