• A. $x+y+1$
• B. $x-y$
• C. $x+y-1$
• D. $x-y-1$

Answer: Option C

Explanation:

• A. x+y-1
• B. x-y+1
• C. 2x-y-1
• D. 1+y

Answer: Option B

Explanation:

• A. x+y-1
• B. 1-x-y
• C. x-y-1
• D. x+y+1

Answer: Option D

Explanation:

• A. (x+6) (x-7)
• B. (x-6) (x-7)
• C. (x-6) (x+7)
• D. (x+6)(x+7)

Answer: Option A

Explanation:

• A. $\frac{x+5}{x+6}$
• B. $\frac{x+5}{x-6}$
• C. $\frac{x-5}{x+6}$
• D. $\frac{x-5}{x-6}$

Answer: Option A

Explanation:

• A. $\frac{x+5}{x+6}$
• B. $\frac{x+5}{x-6}$
• C. $\frac{x-5}{x+6}$
• D. $\frac{x-5}{x-6}$

Answer: Option A

Explanation:

• A. $(x-5)\left(x-4\right)$
• B. $(x+5)\left(x-4\right)$
• C. $(x-5)\left(x+4\right)$
• D. $(x+5)\left(x+4\right)$

Answer: Option C

Explanation:

• A. (x +1)
• B. (x +2)
• C. (x-3)
• D. (x-1)

Answer: Option A

Explanation:

• A. $3,4$
• B. $3,-4$
• C. $-3,4$
• D. $-3,-4$

Answer: Option C

Explanation:

• A. -2
• B. -9
• C. 9
• D. 10

Answer: Option C

Explanation:

• A. $\left\{p,q\right\}$
• B. $\left\{p,-q\right\}$
• C. $\left\{-p,-q\right\}$
• D. $\left\{-p,+q\right\}$

Answer: Option A

Explanation:

• A. a,b
• B. a
• C. b
• D. ab

Answer: Option A

Explanation:

• A. {a, b}
• B. {a, -b}
• C. {-a, b}
• D. {-a, -b}

Answer: Option A

Explanation:

• A. 47
• B. 51
• C. 74
• D. 49

Answer: Option A

Explanation:

• A. $-3<x<3$
• B. $-3\le x<3$
• C. $-3\le x\le 3$
• D. $-3<x\le 3$

Answer: Option C

Explanation: