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现在参加这个测试
Algebra Expressions
  • 1. Three times a number decreased by five.
A) 3x + 5
B) 3(x - 5)
C) 3(5 - x)
D) 3x - 5
  • 2. Seven times the sum of a number and 2.
A) 7(x + 2)
B) 2(x + 7)
C) 7x + 2
D) 7x - 2
  • 3. A number squared decreased by eight.
A) m2 - 8
B) m4 - 8
C) m2 + 8
D) m3 - 8
  • 4. Twenty less than the square of a number
A) n2 - 20
B) 2n - 20
C) 20 - n2
D) 20 - n3
  • 5. A number cubed decreased by another number squared.
A) 3x - 2y
B) x3 - y2
C) x3 - x2
D) 3x - 2y
  • 6. The product of six and a number decreased by 4.
A) 6(x + 4)
B) 6x - 4
C) 6x + 4
D) 6 + x - 4
  • 7. A number to the fifth power increased by ten.
A) x5 + 10
B) 5x + 10
C) x5 - 10
D) 5x - 10
  • 8. Eight times the difference of two numbers
A) (m - n)8
B) 8m - n
C) 8(m - 8)
D) 8(m - n)
  • 9. Five times a number minus the product of a different number and 9.
A) 5x - 9x
B) 5x - 9y
C) (5x)(9y)
D) 9x - 5y
  • 10. Four less than 5 times a number cubed
A) 5n3 + 4
B) 4 - 5n3
C) 5n3 - 4
D) 4 - 15n
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