The system of equations representing the number of Blue-ray discs and DVD's after t months are:
507 + 26t
925 - 12t
Each month, the number of DVD's sold decreases by 12, this can be modelled as:
number of DVD in opening month - (monthly decrease x number of months)
Number of DVD's in t months = 925 - 12t
Each month, the number of Blue-ray discs sold increases by 26, this can be modelled as:
number of blue-ray discs in opening month + (monthly increase x number of months)
Number of Blue-ray discs in t months = 507 + 26t
To learn more about growth rate, please check: brainly.com/question/18760477
Answer:
5. There were 30 students in that class.
6. Drew weighed 245 pounds at the start.
Step-by-step explanation:
5. Since 3 students are absent in which represents 10% of the classroom, multiply the number 3 by 10 to get 30 students which represents the full roster.
6. 20% of his original weight is 49, multiply that number by 5 to get the original weight which is 245 pounds.
2 straight lines that never cross each other
7. C
8.A. sqrt(144)
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Yes visualizing is good that’s why we do word problems
