A. a2+ 9a – 20
B. a2– 9a + 20
C. a2 + 9a + 20
D. a2– 9a – 20
The sum of X and Y's age is 105. When X was Y's age, she was 1.5 times Y's age then what are their present ages?
If x = 1 – q and y = 2q + 1, then for what value of q, x is equal to y?
If k – 7 = 7 (1 – k), then what is the value of k?
If r varies directly as n and r/m = 10, then what is the value of r when m = 2.2?
[148-{28-58}]≥(?)
Simplify the expression (1+i)6+(1+i)4 .
6(3 – x) –5 (2x – 4) = 4(3x–) + 14In the above equation the value of x is:
The number of solutions of x2 - 5|x| + 6 = 0 is
If α, β are the roots of (x –√ 3) (x –√ 5) =√ 7, the roots of (x –α) (x –β) +√ 7= 0 are
Solve the simultaneous inequalities: 13x + 4 < 5x +20 andl2x+5>9x + 14.