11.9 Proficiency exam

( [link] ) ${\displaystyle {\displaystyle 5x+6y+3z}}$

( [link] ) ${\displaystyle {\displaystyle 8m-2n-4}}$

( [link] ) In the expression ${\displaystyle -9a}$ , how many ${\displaystyle a}$ ’s are indicated?

( [link] ) ${\displaystyle 6a-3b}$ , if ${\displaystyle a=-2}$ , and ${\displaystyle b=-1}$ .

( [link] ) ${\displaystyle -5m+2n-6}$ , if ${\displaystyle m=-1}$ and ${\displaystyle n=4}$ .

( [link] ) ${\displaystyle -x^2+3x-5}$ , if ${\displaystyle x=-2}$ .

( [link] ) ${\displaystyle y^2+9y+1}$ , if ${\displaystyle y=0}$ .

( [link] ) ${\displaystyle -a^2+3a+4}$ , if ${\displaystyle a=4}$ .

( [link] ) ${\displaystyle -(5-x{)}^2+7(m-x)+x-2m}$ , if ${\displaystyle x=5}$ and ${\displaystyle m=5}$ .

( [link] ) ${\displaystyle 6y+5-2y+1}$

( [link] ) ${\displaystyle \text{14}a-3b+5b-6a-b}$

( [link] ) ${\displaystyle 9x+5y-7+4x-6y+3(-2)}$

( [link] ) ${\displaystyle x+7=\text{15}}$

( [link] ) ${\displaystyle y-6=2}$

( [link] ) ${\displaystyle m+8=-1}$

( [link] ) ${\displaystyle -5+a=-4}$

( [link] ) ${\displaystyle 4x=\text{104}}$

( [link] ) ${\displaystyle 6y+3=-\text{21}}$

( [link] ) ${\displaystyle \frac{5m}{6}=\frac{\text{10}}{3}}$

( [link] ) ${\displaystyle \frac{7y}{8}+\frac{1}{4}=\frac{-\text{13}}{4}}$

( [link] ) ${\displaystyle 6x+5=4x-\text{11}}$

( [link] ) ${\displaystyle 4y-8-6y=3y+1}$

( [link] and [link] ) Three consecutive even integers add to -36. What are they?

( [link] and [link] ) The perimeter of a rectangle is 38 feet. Find the length and width of the rectangle if the length is 5 feet less than three times the width.

( [link] and [link] ) Four numbers add to -2. The second number is three more than twice the negative of the first number. The third number is six less than the first number. The fourth number is eleven less than twice the first number. Find the numbers.