90147 ALGEBRA 2006. QUESTION ONE Solve these equations:
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Transcript of 90147 ALGEBRA 2006. QUESTION ONE Solve these equations:
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90147 ALGEBRA
2006
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QUESTION ONE
• Solve these equations:
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2(x − 3) = 8
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2(x − 3) = 8
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5x + 7 = x − 2
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5x + 7 = x − 2
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3x(x + 4) = 0
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3x(x + 4) = 0
x = 0, -4
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QUESTION TWO
• Expand and simplify:• (3x − 1)(x − 2) =
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QUESTION TWO
• Expand and simplify:• (3x − 1)(x − 2) =
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QUESTION THREE
• Simplify:
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QUESTION THREE
• Simplify:
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QUESTION FOUR• Mary prints flowers onto different-shaped tablecloths. • Mary’s rule for calculating the total number of flowers, F,
she prints onto a tablecloth is:• • where n is the number of edges on the tablecloth. • • Use this rule to calculate the total number of flowers, F,
she prints on a tablecloth that has 6 edges.• • The total number of flowers, F =
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QUESTION FOUR• Mary prints flowers onto different-shaped tablecloths. • Mary’s rule for calculating the total number of flowers, F,
she prints onto a tablecloth is:• • where n is the number of edges on the tablecloth. • • Use this rule to calculate the total number of flowers, F,
she prints on a tablecloth that has 6 edges.• • The total number of flowers, F =
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QUESTION FOUR• Mary prints flowers onto different-shaped tablecloths. • Mary’s rule for calculating the total number of flowers, F,
she prints onto a tablecloth is:• • where n is the number of edges on the tablecloth. • • Use this rule to calculate the total number of flowers, F,
she prints on a tablecloth that has 6 edges.• • The total number of flowers, F =
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QUESTION FIVE
• Simplify
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QUESTION FIVE
• Simplify
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QUESTION SIX
• Peter has more than twice as many CDs as Mary.
• Altogether they have 97 CDs. • • Write a relevant equation, and use it to find
the least number of CDs that Peter could have.• • Least number of CDs that Peter could have =
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QUESTION SIX
• Peter has more than twice as many CDs as Mary.
• Altogether they have 97 CDs. • Mary = x, Peter = more than 2x• Write a relevant equation, and use it to find
the least number of CDs that Peter could have.• • Least number of CDs that Peter could have =
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QUESTION SIX
• Peter has more than twice as many CDs as Mary.
• Altogether they have 97 CDs. • Mary = x, Peter = more than 2x• Write a relevant equation, and use it to find
the least number of CDs that Peter could have.• • Least number of CDs that Peter could have =
Peter has more than twice ‘x’ so he must have at least 65 CDs
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QUESTION SEVEN
• Paul bought some CDs in a sale. • He bought four times as many popular CDs as
classical CDs. • The popular CDs, P, were $1.50 each.• The classical CDs, C, were 50 cents each. • He spent $52 altogether. • • Solve these equations to find out how many
classical CDs Paul bought.
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• Solve these equations to find out how many classical CDs Paul bought.
•• 4C = P• 1.5P + 0.5C = 52
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• Solve these equations to find out how many classical CDs Paul bought.
•• 4C = P• 1.5(4C) + 0.5C = 52 • C = 8
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QUESTION EIGHT
• James is five years old now and Emma is four years older.
• • Form a relevant equation and use it to find out
how many years it will take until James’s and Emma’s ages in years, multiplied together, make 725 years.
• • Show all your working.
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QUESTION EIGHT
• James is five years old now and Emma is four years older.
• • Form a relevant equation and use it to find out
how many years it will take until James’s and Emma’s ages in years, multiplied together, make 725 years.
• Add x to each age and then multiply• Show all your working.
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QUESTION EIGHT
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QUESTION EIGHT
Answer is 20