jen thought of a number. she called her number k. she subtracted 34 from her number, multiplied the result by 9, and she got 72.
what was k equal to?
1 answer:
(k - 34) x 9 =72
k - 34 = 72/9
k - 34 = 8
k = 8 + 34
k = 42
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Answer:
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(a+b)
2
=a
2
+2ab+b
2
(a−b)
2
=a
2
−2ab+b
2
Now,
(i)
(x+3y)
2
=x
2
+2×x×3y+(3y)
2
=x
2
+6xy+9y
2
(ii)
(2x−5y)
2
=(2x)
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−2×2x×5y+(5y)
2
=4x
2
−20xy+25y
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(iii)
(a+
5a
1
)
2
=a
2
+2×a×
2a
1
+(
2a
1
)
2
=a
2
+1+
4a
2
1
(iv)
(2a−1a)=(1a)
2
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=1a
2
Answer
Step-by-step explanation:
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Answer:
They are in A. P so the sum will be 2380
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