Michel runs 6 miles in 50 minutes.At the same rate , how many miles would he run in 35 minutes
2 answers:
the awser would be 3 i think
6/50 = x/35
6*35 = 50*x
210 = 50x
50x = 210
x = 210/50
x = 4.2
He runs about 4.2 miles.
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Answer:
Since we know that
(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)
2
−2×2x×5y+(5y)
2
=4x
2
−20xy+25y
2
(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
(1a)
2
=1a
2
Answer
