The difference of Ellen’s age and her sister Mary’s age is 4 years. Ellen is 5 years less than twice Mary’s age.

Mathematics

2 answers:

Alona [7]3 years ago

6 0

Answer:I think mary is 14

Step-by-step explanation: Im so sorry if im wrong if am just tell me and ill change my answer

Paha777 [63]3 years ago

3 0

Answer:

I believe the answer is 9 years old or 8 years old.

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AnnyKZ [126]

Answer:

D. y = 12.5x + 15

Step-by-step explanation:

Using the values provided in the table, the only equation that would be valid would be the following...

y = 12.5x + 15

That is because if we substitute any value provided in the table for x , this equation will correctly output the y value shown in the table for the attached x-value. For example, in the table 5 nights (x = 5) should have a total cost of 77.5 (y = 77.5)... Therefore, if we substitute 5 for x in the function it should give us 77.5 which it does.

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3 years ago

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sattari [20]

Answer:

Second box for Justifications: Subtraction Property of equality

Third box for steps: $\frac{2}{3} y=-6$