The answer is 18 .
All you have to do is swich the numbers
All you have to do is swich the numbers
Use a quadratic equation to find two real number that satisfy each situation, or show that no such number exist. Their sum is 4,
1 answer:
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Answer:
first one
Step-by-step explanation:
Tracey bought 10 movies
some cost 13 and the others 16
Let x be the movies that cost 13 and y ones that cost 16
we can state that
- x+y = 10
since Tracey both ten
- 13x+ 16y = 139
since the total price is 139
so the system is :