Answer :
If Hawa pays a flat cost of $51.50 per month and $3 per gigabyte and she wants to keep her bill at $64.10 per month. then the equation which can be used to determine gigabyte is 51.50+3x=64.10 and the number of gigabytes of data Hawa can be used is 4.2 gigabytes
Given,
The flat cost = $51.50 per month
The cost per gigabyte = $3
She wants to keep her bill = $64.10
Consider the number of gigabytes used as x
Then the equation is
51.50+3x=64.10
3x=12.6
x=4.2
Hence, if Hawa pays a flat cost of $51.50 per month and $3 per gigabyte and she wants to keep her bill at $64.10 per month. then the equation which can be used to determine gigabyte is 51.50+3x=64.10 and the number of gigabytes of data Hawa can be used is 4.2 gigabytes.
Learn more about equation here
https://brainly.com/question/14686792
#SPJ1