Mikayla wrote the equation below to calculate y, the total amount of money in dollars she will have saved after she has been saving for x weeks. y = 6x + 80 How much more money will Mikayla have saved after 8 weeks compared to 5 weeks?
$8
$18
$98
$128
How do i do this?
Write two equations. Substitute 5 for x in one equation. Substitute 8 for x in the other equation.
what is 6 times 8 minus 80
what is 6 times 5 minus 80
subtract the second amount from the first, I get
6(8-5)
Ok so will it look like this then?
y = 30 + 80
y= 48 + 80
And the answer would be $18?
correct answer.
Yeah!!:))))) Thanks guys!
To find out how much more money Mikayla will have saved after 8 weeks compared to 5 weeks, we need to calculate the value of y for both time periods and then find the difference between them.
To calculate the value of y for a given number of weeks, we can substitute that number into the equation y = 6x + 80, where x represents the number of weeks.
For 5 weeks:
y = 6(5) + 80
y = 30 + 80
y = 110
For 8 weeks:
y = 6(8) + 80
y = 48 + 80
y = 128
Now, we can find the difference between the amounts saved after 8 weeks and 5 weeks:
Difference = 128 - 110
Difference = 18
Therefore, Mikayla will have $18 more saved after 8 weeks compared to 5 weeks.