문자와 식 단원 종합

X.1Write an expression for each.

1. 1
   The quotient of y and 8
2. 2
   2 times n
3. 3
   The quotient of n and 10, plus 3
4. 4
   The quotient of n and 7

X.2Answer each question about the expression.

1. 5
   Number of terms in $3m+9n+7a$ 
2. 6
   Number of terms in $5b+k+7y+2$ 

X.2Answer each question about the expression. (continued)

1. 7
   Coefficient of $x$ in $3x+11k+12b+7$ 
2. 8
   Number of terms in $2k+2b$ 

X.3X.4Evaluate each expression for the given value.

1. 9
   $2n+20$ when $n=10$
2. 10
   $5n+11$ when $n=5$
3. 11
   $7n-11$ when $n=7$
4. 12
   $5x-5$ when $x=12$
5. 13
   $7(k+10)$ when $k=12$
6. 14
   $9x^2$ when $x=8$
7. 15
   $a^2-14$ when $a=8$
8. 16
   $n^2-4$ when $n=12$

X.5Evaluate each expression for the given values.

1. 17
   $bk+18$ when $b=9$, $k=3$
2. 18
   $6a-y$ when $a=4$, $y=5$

X.5Evaluate each expression for the given values. (continued)

1. 19
   $ka+18$ when $k=3$, $a=5$
2. 20
   $5b+14m$ when $b=4$, $m=9$

X.6Evaluate each expression for the given value.

1. 21
   $5a^2$ when $a=2$
2. 22
   $2b^2$ when $b=6$
3. 23
   $2(p+5)$ when $p=9$
4. 24
   $5(m-3)$ when $m=8$

X.1Write Variable Expressions

1. 1$y÷8$
2. 2$2n$
3. 3$n÷10+3$
4. 4$n÷7$

X.2Terms & Coefficients

1. 5$3$
2. 6$4$
3. 7$3$
4. 8$2$

X.3X.4Evaluate each expression for the given value.

1. 9$40$
2. 10$36$
3. 11$38$
4. 12$55$
5. 13$154$
6. 14$576$
7. 15$50$
8. 16$140$

X.5Evaluate with Two Variables

1. 17$45$
2. 18$19$
3. 19$33$
4. 20$146$

X.6Evaluating Expressions

1. 21$20$
2. 22$72$
3. 23$28$
4. 24$25$