Skip to main content

Algebra: Using Balance

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

(A) 16

(B)-16 

(C)-12

(D)12

(E) 2

 

 

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

(A) $\dfrac{15}{16}$

(B) $\dfrac{15}{128}$

(C) $\dfrac{15}{8}$

(D) $30$

(E) $1$

 

 

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

(A) $-n+7$

(B) $-(n+7)$

(C) $-n-7$

(D) $-(n-1)$

(E) $-(n+1)$

 

 

4. If $4x+3y=9$, then $16x+12y=$?