Marianna wants to buy a new tennis racket that costs $57.50. she has $8 and plans to save $4.50 each week. how many weeks will it take her to save money?

11 weeks

Step-by-step explanation:

she already has $8 so subtract that from $57.50:

57.5 - 8 = 49.5

so she needs to save $49.5. set up the problem like this, where x is the number of weeks needed:

4.5x = 49.5

divide each side by 4.5:

x = 11

it will take her 11 weeks.

idn

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.