Case bought a 10-week-old pig that weighed 30 kg. At 18 weeks, the pig weighed 80 kg. The equation (18 − 10)x + 30 = 80 can be used to find the number of kg (x) the pig gained each week.
choose 1 of the 4
How many kilograms did the pig gain each week?
Responses
A 5.75 kg5.75 kg
B 6.25 kg6.25 kg
C 6.75 kg6.75 kg
D 7.25 kg
To find the number of kilograms the pig gained each week, we can solve the equation (18 - 10)x + 30 = 80 for x:
(18 - 10)x + 30 = 80
8x + 30 = 80
8x = 80 - 30
8x = 50
x = 50/8
x = 6.25 kg
Therefore, the pig gained 6.25 kg each week.
The correct answer is B) 6.25 kg.