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Question (21)

QN0015647

Simplify: 9m + 7n – 4m

(A) 12m + 7n
(B) 5m + 7n
(C) 16mn
(D) 5n

Correct Answer: B

Explanation:

9m – 4m = 5m.

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Question (22)

QN0015648

Simplify: 16x – 9x + 2x

(A) 25x
(B) 9x
(C) 7x
(D) 18x

Correct Answer: B

Explanation:

16 – 9 + 2 = 9.

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Question (23)

QN0015649

Which of the following can be simplified to a single term?

(A) 4x + 5y
(B) 6a – 2b
(C) 3p + 8p
(D) 7m + 4n

Correct Answer: C

Explanation:

Both terms are like terms.

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Question (24)

QN0015650

Simplify: 10y + y + 4y

(A) 14y
(B) 15y
(C) 40y
(D) 5y

Correct Answer: B

Explanation:

10 + 1 + 4 = 15.

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Question (25)

QN0015651

Simplify: 17z – 5z – 2z

(A) 10z
(B) 12z
(C) 20z
(D) 14z

Correct Answer: A

Explanation:

17 – 5 – 2 = 10.

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Question (26)

QN0015652

A student writes 8x + 6y + 2x. The simplified form is:

(A) 16xy
(B) 10x + 6y
(C) 8x + 8y
(D) 10xy

Correct Answer: B

Explanation:

8x + 2x = 10x.

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Question (27)

QN0015653

Simplify: 13a + 7b – 5a

(A) 8a + 7b
(B) 20ab
(C) 15a + 2b
(D) 6a + 7b

Correct Answer: A

Explanation:

13a – 5a = 8a.

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Question (28)

QN0015654

Simplify: 21n – 9n + 4n

(A) 34n
(B) 16n
(C) 12n
(D) 25n

Correct Answer: B

Explanation:

21 – 9 + 4 = 16.

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Question (29)

QN0015655

Simplify: 7p + 2q + 5p – q

(A) 12p + q
(B) 14pq
(C) 11p + q
(D) 12q + p

Correct Answer: A

Explanation:

7p + 5p = 12p and 2q – q = q.

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Question (30)

QN0015656

Which statement is correct?

(A) Unlike terms can always be added directly.
(B) Like terms can be combined by adding or subtracting coefficients.
(C) Variables disappear during simplification.
(D) Coefficients cannot be added.

Correct Answer: B

Explanation:

Only like terms can be combined.

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