The bag of dog food would last for 21 days.
The bag contains 42 cups of dog food. If the dog eats 
cups everyday, the amount of cup in the bag decreases by cups everyday. This can be represented with this expression: 42 - d. Where d represents the number of days.
In order to determine the number of days in which the bag would be emptied, this equation can be used:
Number of days the dog food would last = number of cups in the cup / amount the dog eats each day
42 ÷
42 ÷ 
42 x 
= 21 days
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Answer:
El resultado eres: 
Step-by-step explanation:
Se dan las siguientes funciones
Cuál es el resultado de R(x) + S(x) ?
Se soman los fatores en comun. Entonces:
El resultado eres:
15-t + 8t = -13
15 + 7t = -13
7t = -13-15
7t = -28
t = -4
4a + 11-a = 2
3a = 2-11
3a = -9
a = -3
Answer:
47yd
Step-by-step explanation:
4 + 15 + 15 + 13 = 47yd
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