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jhounsanfreianpiloto
@jhounsanfreianpiloto
September 2022
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Show your solution.
4. A rectangular sign has area 30 square feet. The length of the sign is one foot more than the width. Find the length and width of the sign.
Answers & Comments
aballemjean4
the answer is 6ft×5ft. But I'm sure your teacher wanted you to use something like the quadratic formula. But first:
Substitute in terms of w. w(w + 1) = 30
Turn it into a quadratic formula. w² + w — 30 = 0
Now solve. The quadratic formula is
−±2−4√2
−b±b2−4ac2a
From step 2 above, a = 1, b = 1, and c = —30. Substituting, we get
−1±1+120√2=−1±112={5,−6}
−1± 1+1202= –1±112={5,–6}
Since width can't be negative, w = 5,
and L = 6
3 votes
Thanks 2
jhounsanfreianpiloto
haha Akala ko joke
aballemjean4
Wrong send
aballemjean4
Haha
JohnleeVelez
bro can you do 180?
JohnleeVelez
its thesame but only you change 30 to 180
JohnleeVelez
oh nvm
JohnleeVelez
oh nvm
JohnleeVelez
paturo pano gawin to pre nahihirapan ako
JohnleeVelez
kung okay lang sana haha
JohnleeVelez
yawa
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Answers & Comments
Substitute in terms of w. w(w + 1) = 30
Turn it into a quadratic formula. w² + w — 30 = 0
Now solve. The quadratic formula is
−±2−4√2
−b±b2−4ac2a
From step 2 above, a = 1, b = 1, and c = —30. Substituting, we get
−1±1+120√2=−1±112={5,−6}
−1± 1+1202= –1±112={5,–6}
Since width can't be negative, w = 5,
and L = 6