Solve the following equation for x.

9x - 4 = -49

a. -7
b. -10
c. -5
d -53/-9

C. -5

Step-by-step explanation:

First, add 4 to both sides

9x = -49 + 4

Simplify

-49 + 4 into -45

so 9x = -45

Dividing both sides w/ 9

x = 45/9

Finally, simplify 45/9 into 5

x = -5

Sorry for a late answer...I hope this helps

Option 1 , Option 3 and Option 4 are correct.

Step-by-step explanation:

Number of customers using landlines decreases 10% per year.

Let x be the umber of customers using landlines in 2002.

⇒ Number of customer using landlines in 2003 =

                                                                               =

                                                                               = 0.9x

Number of customers using landlines in 2004 =  

                                                                              =

                                                                              =

                                                                              =

Therefore, from this Option 1 , Option 3 and Option 4 are correct.