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20 results for "algebra"
Questions 20
If (a + b) : (a - b) = 15 : 1, then what is the ratio (a² + b²) : (a² - b²)?
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Find a third proportional to (x² - y²) and (x - y).
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If (x + y) : (x - y) = 4 : 1, then (x² + y²) : (x² - y²) is equal to:
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If a : b = c : d, then (ma + nc) : (mb + nd) is equal to:
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The sum of two numbers is 40 and their difference is 4. What is the ratio of the two numbers?
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Two numbers are in the ratio 1 : 2. If 7 is added to both, their ratio changes to 3 : 5. Find the greater number.
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If a/b = 4/5 and b/c = 15/16, then (c²-a²) / (c²+a²) is:
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What is the third proportional to (x/y + y/x) and √(x² + y²)?
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The ratio of three numbers is 3 : 4 : 5 and the sum of their squares is 1,250. Find the numbers.
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If x : y = 2 : 1, find the value of (5x² + 3xy) : (4x² - y²).
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If (a + b) : (a - b) = 15 : 1, then find the value of (a² + b²) : (a² - b²).
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If x/5 = y/8, then (x+5) : (y+8) is equal to:
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If 4a = 5b and 7b = 9c, then find the ratio a : c.
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What number should be added to each of 6, 7, 15 and 17 so that the resulting numbers are in proportion?
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The third proportional to (a² - b²) and (a - b) is:
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If a : b = c : d, then (ma + nc) / (mb + nd) is equal to:
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If a : b = 5 : 7 and c : d = 2a : 3b, then ac : bd is:
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The sum of ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?
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If x : y = 5 : 2, find the value of (8x + 9y) : (8x + 2y).
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If a : b = c : d, then which of the following is true by 'Componendo and Dividendo'?
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