Respuesta :
c = number of CDs purchased
d = number of DVDs purchased.
Sam wants to buy at least twice as many DVDs as CDs, therefore
d >= 2c (1)
Sam can spend up to $50. Each CD costs $7 and each DVD costs $12. Therefore
7c + 12d <= 50 (2)
Equations (1) and (2) represent the system of inequalities for the problem.
d = number of DVDs purchased.
Sam wants to buy at least twice as many DVDs as CDs, therefore
d >= 2c (1)
Sam can spend up to $50. Each CD costs $7 and each DVD costs $12. Therefore
7c + 12d <= 50 (2)
Equations (1) and (2) represent the system of inequalities for the problem.
Answer:
The inequalities that will be used are:
d ≥ 2c
7c+12d ≤ 50
Step-by-step explanation:
Let:
c = number of CDs purchased
d = number of DVDs purchased.
It is given that:
Samuel wants to buy at least twice as many DVDs as CDs.------------(1)
CDs sell for $7 each, and DVDs sell for $12 each.
Samuel can spend a maximum of $50.-----------------(2)
Let c represent the number of CDs, and let d represent the number of DVDs.
Hence, we have from first statement that:
d ≥ 2c.
From the second statement we have:
7c+12d ≤ 50
Hence, the inequalities used are:
d ≥ 2c
7c+12d ≤ 50.
