Question : Name the variables in the equation 1) N = 2ab : 2163595

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Name the variables in the equation.

1) N = 2ab

A) N, a, b

B) 2, a, b

C) N

D) a, b

2) s = (7bc/2)

A) b, c

B) s

C) s, b, c, 7, 2

D) s, b, c

3) A = πr²

A) A, π

B) A, π, r

C) π, r

D) A, r

4) V = πr²h

A) V, π, h

B) V, r, h

C) r, h

D) V, π, r, h

5) A = (1/2) bh

A) A, 2, b, h

B) b, h

C) 2, b, h

D) A, b, h

6) p = 4s

A) p, 4, s

B) s

C) p, s

D) 4, s

7) A = (1/2)b (h₁ - h₂)

A) A, b

B) b, h₁, h₂

C) A, 2, b, h₁, h₂

D) A, b, h₁, h₂

Combine like terms.

8) -9x - 6x

A) -3x

B) -15 + x

C) -15x

D) 54x

9) -3x - 4x - 9x

A) -16

B) -7x - 9x

C) -16 + x

D) -16x

10) (1/2)x - (5/6)x + (7/12)x

A) (1/3)x

B) (1/4)x

C) (1/12)x

D) - (11/12)x

11) 8x + 2 - 5x + 3

A) 13x + 5

B) 3x + 5

C) (8x - 5x) + (2 + 3)

D) 8

12) 0.8x + 7 + 2x + 2.1

A) 0.8x + 2x + 7 + 2.1

B) 1.6x + 14.7

C) 2.8x + 9.1

D) 11.9

13) 3x + 3y - 8 + 7x

A) 10x + 3y - 8

B) 10x + 3y

C) 10x - 5y

D) 5xy

14) -5x + 2.7y + 0.6x - 4y

A) -4.4x - 1.3y

B) -1.3x - 4.4y

C) -5x + 0.6x + 2.7y - 4y

D) -5.7xy

15) -8b + 4a - 4c - 3b + 5a

A) 9a - 11b - 4c

B) 9a - 11b

C) -1a - 11b - 4c

D) -11a + 9b - 4c

16) - (1/2)x + (1/3)y + (1/3)x + (1/5)y

A) - (2/3)x + (1/15)y

B) - (1/6)x + (8/15)y

C) - (5/6)x + (8/15)y

D) - (1/6)x + (1/15)y

17) -3x - 6.4y + 11.1x - 3.5y - 8.1x + 9.9y

A) -7.1x + 5.9y

B) 7.1x - 5.9y

C) 0

D) 7.1x + 5.9y

18) 4a + 1.4 - 0.9c - 7a + 8 + 3 c + 3a

A) -6a + 2.1c + 9.4

B) -3a - 3.9c + 9.4

C) 3.5c + 8

D) 2.1c + 9.4

19) Find the perimeter.

A) 30x + 1 meters

B) 30x + 3 meters

C) 27x + 3 meters

D) 28x + 15 meters

20) Find the perimeter.

A) 4.4x + 8y + 3.5

B) 6.4x + 9y + 0.5

C) 5.4x + 7y + 0.5

D) 8.4x + 10y + 3.5

Write the equation without multiplication signs.

21) u = 2 × m + 5 × n

A) u = 5m + 2n

B) u = 2m + 5n

C) u = 10mn

D) u = 7 + m + n

22) T = 4 × f - 5 × t

A) T = 4 + f - 5 + t

B) T = 4f 5t

C) T = 4f - 5t

D) T = 4f - 5 × t

23) B = (b × c + b × d/7)

A) B = (b² + cd/7)

B) B = (bc + bd/7)

C) B = (b²cd/7)

D) B = (b + c + d/7)

24) C = 2 × π × r

A) C = 2πr

B) C = 2π × r

C) C = 2 × πr

D) C = 2 + π + r

25) V = (π × r² × h/3)

A) V = (πh/3)

B) V = (πr²h/3)

C) V = (π × r²h/3)

D) V = (πr² × h/3)