Suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y
x+y=13
(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76.
9514 1404 393
Answer:
C. -6 and -9
Step-by-step explanation:
For the polynomial to be zero, one or more of the factors must be zero. For the factors to be zero, we require ...
x +6 = 0
x = -6 . . . . . . subtract 6 from both sides of the equation
and likewise, ...
x +9 = 0
x = -9 . . . . . . subtract 9 from both sides of the equation
x = -6 or -9 will make the polynomial zero.
5-2(x+6)=145-2x-12=14
-7-2x=14
-2x=21
-10.5
Answer:
what do you need help with
Step-by-step explanation:
3 < 3x+6
-3<3x
-1<x
3x+6<24
3x<18
x<6
-1<x<6 the book is right