In a year, the United States consumes about 146,000,000,000 gallons of gasoline. Express this number in scientific notation.
2 answers:
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Answer:
x = 7
Step-by-step explanation:
Since the figures are similar then the ratios of corresponding sides are in proportion , that is
=
, substitute values
=
( cross- multiply )
48(7x - 9) = 60(4x + 4) ← divide both sides by 48
7x - 9 = 1.25(4x + 4) ← distribute parenthesis
7x - 9 = 5x + 5 ( subtract 5x from both sides )
2x - 9 = 5 ( add 9 to both sides )
2x = 14 ( divide both sides by 2 )
x = 7