METALS WILL BE GIVEN.
Solve. Show all your work and explain your steps. the triagle on the left has a perimeter of 14. the triangle on the right has a perimeter of 21. what are x & y ?

Question

METALS WILL BE GIVEN. 
Solve. Show all your work and explain your steps. the triagle on the left has a perimeter of 14. the triangle on the right has a perimeter of 21. what are x & y ?

anonymous · Answer

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anonymous · Answer

Hmmm. So perimeter is all sides added together, can you write an equation for the perimeter of the first one?

anonymous · Answer

p = 2y + 1x is that right?

anonymous · Answer

Yep but you know the perimeter so go ahead and put that in to

x+2y=14

now the second one

anonymous · Answer

3x + 5/4y = 21 is that right?

anonymous · Answer

Forgot a side

3x+(5/4)y+(5/4)y=21

which simplifies to

3x+(5/2)y=21

so now we have two equations


3x+(5/2)y=21
x+2y=14

any idea how to solve?

anonymous · Answer

We could use the elimination process right?

anonymous · Answer

You could. Multiply the second equation by -3 and then add the two equations together