Variable x is 7 more than variable y.

Mathematics
Tutor: None Selected Time limit: 1 Day

Variable x is 7 more than variable y. Variable x is also 1 less than y. Which of the following pairs of equations best models the relationship between x and y?

A   x = 1y, x = y + 7

B   x = y + 7, x = y − 1

Cy = x + 8, y = x − 1

y = 7x, y = x + 1

May 7th, 2015

The answer is B x = y + 7, x = y − 1

May 7th, 2015

OK thank you. Can you answer one more?

May 7th, 2015

sure

May 7th, 2015

Shiloh is 7 years older than Courtney. Shiloh's age is 13 years less than two times Courtney's age. The system below models the relationship between Shiloh's age (s) and Courtney's age (c): 

s = c + 7 
s = 2c − 13 

Which of the following methods is correct to find Shiloh's and Courtney's age?

A:Solve s + 7 = 2s − 13 to find the value of s.

B:Solve c + 7 = 2c − 13 to find the value of c.

C:Write the points where the graphs of the equations intersect the x-axis.

D:Write the points where the graphs of the equations intersect the y-axis.

May 7th, 2015

The answer is B

May 7th, 2015

Do you have the time to do one more?

May 7th, 2015

Take your problems into paid category please and I will do all of them

May 7th, 2015

Sorry but this was my last question and I have no money to pay you.

May 7th, 2015

Ok, give your question

May 7th, 2015

I figured it out.

May 7th, 2015

Ok

May 7th, 2015

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