Ava and addison are saving for a new cell phone. ava is starting with $100 and adding $5 each week. addison is starting with $200 and adding $4 each week. write and solve a system that can be used to find out after how many weeks ava and addison will have the same amount of money saved!

it takes 90 weeks for them to have the same amount of money saved which would be 600 dollars

Step-by-step explanation:

100 Addison                                                         200 Ava

1. 10 weeks= $50                                       1. 10 weeks= $40

2. 10 weeks= $50                                      2. 10 weeks= $40

3. 10 weeks= $50                                      3.  10 weeks= $40

4. 10 weeks= $50                                      4. 10 weeks= $40

5. 10 weeks= $50                                      5. 10 weeks= $40

6. 10 weeks= $50                                      6. 10 weeks= $40

7. 10 weeks= $50                                       7. 10 weeks= $40

8. 10 weeks= $50                                       8. 10 weeks= $40

9. 10 weeks= $50                                       9. 10 weeks= $40

Equals $600                                                     Equals $600

Hope this helps took me some time!

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.