Answer:
A
Step-by-step explanation:
common ratio of 0.5.
hmu for more
Answer:
A) la que cuesta $1.89
B)$5.68
C)$5.68
Step-by-step explanation:
4, 5, and 7 are mutually coprime, so you can use the Chinese remainder theorem right away.
We construct a number
such that taking it mod 4, 5, and 7 leaves the desired remainders:

- Taken mod 4, the last two terms vanish and we have

so we multiply the first term by 3.
- Taken mod 5, the first and last terms vanish and we have

so we multiply the second term by 2.
- Taken mod 7, the first two terms vanish and we have

so we multiply the last term by 7.
Now,

By the CRT, the system of congruences has a general solution

or all integers
,
, the least (and positive) of which is 27.
Try this solution:
1. according to the condition

2. for more details see the attached graph.
Answer: [0;+oo)