Answer:

Step-by-step explanation:
Given

Required
Solve
We have:

Collect like terms


So:

Centimeters are the metric unit of length
Answer:
It would be 7cm
Step-by-step explanation:
please find step by step explanation on the picture
Answer:
1,596 cm cubed
Step-by-step explanation:
Volume of box = 12*7*19= 1,596 cm cubed
Answer:
need to spend $18 more in addition to $12
Step-by-step explanation:
Given: According to online music store, if you spend $30 or more, you receive 3 songs for free
To find: How much more money need to be spend in addition to $12 to receive three free songs
Solution:
Let x denotes amount to be spend in addition to $12 to receive three free songs
According to question,
