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anonymous
 one year ago
please help this is my first post
The perimeter of a rectangle is 50 cm and the length is 4 cm longer than the width. Write and solve the system of equations using the substitution method.
A. width = 10 cm, length= 14 cm
B. width = 10 1/2 cm, length= 14 1/2 cm
C. width = 11 cm, length= 15 cm
D. width = 23 cm, length= 27 cm
anonymous
 one year ago
please help this is my first post The perimeter of a rectangle is 50 cm and the length is 4 cm longer than the width. Write and solve the system of equations using the substitution method. A. width = 10 cm, length= 14 cm B. width = 10 1/2 cm, length= 14 1/2 cm C. width = 11 cm, length= 15 cm D. width = 23 cm, length= 27 cm

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Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2let W = width L = length perimeter = 2(L+W) L = W + 4 do you think you can take it from here?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no i dont understand any of this lol thats why im a senior retaking algebra one

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2well, to find the perimeter of a rectangle, we add the width and length, then multiply everything by 2, so perimeter = 2(L+W) make sense so far?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes that makes sense

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2ok, the problem also tells us that "length is 4 more than the width" so L = W + 4, make sense so far?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2great, now let's put them together and go from there perimeter = 50 = 2(L+W) L = W + 4 now, the second equation tells us that we can replace "L" with "W+4" whenever we see L, so we can plug that into the first equation, giving us: 50 = 2(L+W) = 2(W + 4 + W) with me so far?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2well, the second equation tells us that "length" is the same as "width+4" so we can replace "length" with "width + 4". the reason why we do this is to make all the letters in the first equation the same, so we can find width 50 = 2(W + 4 + W) we can put W + W together to get 2W, which gives us 5= 2(2W+4), with me so far?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2ok, so we have 50 = 2(2W+4) we can divide both sides by 2 to get 25 = (2W+4) do you think you can solve for W now?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2ok, give it a shot and tell me what W is I'll guide you if you get stuck

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2no worries 25 = (2W+4) subtract 4 from each side, what do you get?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait is the answer D

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2nope, not D, please try the problem with me 25 = (2W+4) subtract 4 from both sides of the equals sign

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0subtract 4 from 25 thats 21 ok

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2what about the right side? 2W + 4  4 = ?
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