Evaluate Algebraic Expressions

Questions on how to evaluate algebraic expressions in algebra are presented along with answers and feedback. Hints on how to solve these questions are also included.

\( \) \( \)\( \)

Q1)
If \( x =1 \) , then \( 2x = \)

A. \( 0.5 \)

B. \( 1 \)

C. \( -2 \)

D. \( 2 \)

E. \( - 1\)


Q2)

Evaluate the expression \( 2x - 3y\) for \( x = 2 \) and \( y = -3 \)

A. \(1 \)

B. \(-1 \)

C. \(-13 \)

D. \(-5 \)

E. \(13 \)


Q3)
If \( a = \dfrac{1}{3} \), then \( -6 a = \)

A. \(- 2 \)

B. \(2 \)

C. \(-0.5 \)

D. \(-18 \)

E. \(18 \)


Q4)
If \( F = 2 x^2 \), then for \( x = -2 \), \( F = \)

A. \( - 8 \)

B. \( 8 \)

C. \( - 6 \)

D. \( 6 \)

E. \( - 2 \)


Q5)
For \( x = -3 \) and \( y = 2 \), \( x^2 + y^3 = \)

A. \( 1 \)

B. \( - 1 \)

C. \( 17 \)

D. \( - 17\) >

E. \( 0 \)


Q6)
If \( b = - \dfrac{1}{2} \), then \( b^2 = \)

A. \( 4 \)

B. \( - \dfrac{1}{4} \)

C. \( - 1\)

D. \( 1 \)

E. \( \dfrac{1}{4} \)


Q7)
Evaluate \( 2x^2 + 3 x - 5 \) for \( x = -2 \)

A. \( 3 \)

B. \( - 3\)

C. \( - 19 \)

D. \( 9 \)

E. \( - 9 \)


Q8)
If \( a = - 2 \) and \( b = \dfrac{1}{3} \), then \( 2 a^2 + 9b^2 - 2 = \)

A. \( 7 \)

B. \( - 7 \)

C. \( - 9 \)

D. \( - 11 \)

E. \( 5 \)


Q9)
Evaluate the expression \( 4 x y + y^2 + 2 x y \) for \( x = \dfrac{1}{2} \) and \( y = - 3 \)

A. \( - 5 \)

B. \( 5 \)

C. \( 0\)

D. \( - 1 \)

E. \( 1 \)


Q10)
If \( a = 1.1 \) and \( b = - 2.1 \), then \( 3 a + 4 b - a b = \)

A. \( - 3.79 \)

B. \( 2.99 \)

C. \( 2.79 \)

D. \( - 2.79 \)

E. \( - 3.99\)


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