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8. What is the mathematical symbol of "four decreased by a certain number is less than 5”?
A. 4 - m < 5
B. m < 5-4
C. 5 < m - 4
D.m - 5<4
9. What is the translation in mathematical expression of “2 more than 5 times a number"?
A. 5n + 2
B. 2 + 5n
C. 2n + 5
D. 5 + 2n
10. What is the mathematical symbol of the product of 10 and x increased by 4?
A. 4 + (10x)
B. (10 + x) + 4
C. (10x) + 4
D. 4 + (10 + x)
11. What is the sum of 4a - 3 and 7a - 4?
A. 11a + 7
B. 3a - 7
C. 11a-7
D. 3a + 7
12. What must be added to 4x + 6 to obtain 2x + 11?
A. 2x - 5
B. 6x + 17
C.-2x + 5
D. 6x - 17
13. When we subtract 8x2 + 6x - 3 from 6x2 - 4x + 2, what is the result?
A. 2x2 + 10x + 5
B. -2x2 - 10x + 5
C. 2x2 - 10x - 5 D. 2x2 + 10x - 5​