if the products of the roots of the equation x2-3kx+2e2logk-1=0 is 7, then the roots are real for k=..........
The longest side of a triangle is 3 times the shortest side and the third side
A man wants to cut three lengths from a single piece of board of length 91 cm. The second length is to be 3 cm longer than the shortest and the third length is to be twice as long as the shortest. What are the possible lengths of the shortest board if the third piece is to be at least 5 cm longer than the second?
[Hint: If x is the length of the shortest board, then x, (x + 3) and 2x are the lengths of the second and third piece, respectively. Thus, x = (x + 3) + 2x ≤ 91 and 2x ≥ (x + 3) + 5]
How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?
in the first four paper each of 100 marks, rishi got 95,72,73,83 marks. if he wants an average of greater than or equal to75 marks and less than 80 marks , find the range of marks he should score in the fifth paper.
in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.
sir i dont understand this line ......
however when both inequalities are multiplied opr divided by a negative number then the sign of the inequality is reserved .. ????
IQ of a person is given by the formula
IQ = (MA/CA)*100,
where MA is the mental age & CA is the chronological age. If 80≤IQ≤140 for a group of 12 yr children, find the range of their mental age.
A milk of 80% concentration is diluted at home by the seller by adding some water to it so that milk concentration is reduced between 65% to 70%. If 640 litres of milk of 80% concentration is available, how much water has been added? Which value system the seller is lacking.
A company manufactures cassettes. Its cost and revenue functions are C(x)=26000+30xand R(x)=43x, respectively, where x is the number of cassettes produced and sold in a week. How many cassettes must be sold by the company to realise some profit?
|x-1|+|x-2|+|x-3|>=6
if the products of the roots of the equation x2-3kx+2e2logk-1=0 is 7, then the roots are real for k=..........
The longest side of a triangle is 3 times the shortest side and the third side
A man wants to cut three lengths from a single piece of board of length 91 cm. The second length is to be 3 cm longer than the shortest and the third length is to be twice as long as the shortest. What are the possible lengths of the shortest board if the third piece is to be at least 5 cm longer than the second?
[Hint: If x is the length of the shortest board, then x, (x + 3) and 2x are the lengths of the second and third piece, respectively. Thus, x = (x + 3) + 2x ≤ 91 and 2x ≥ (x + 3) + 5]
How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?
in the first four paper each of 100 marks, rishi got 95,72,73,83 marks. if he wants an average of greater than or equal to75 marks and less than 80 marks , find the range of marks he should score in the fifth paper.
in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.
sir i dont understand this line ......
however when both inequalities are multiplied opr divided by a negative number then the sign of the inequality is reserved .. ????
IQ of a person is given by the formula
IQ = (MA/CA)*100,
where MA is the mental age & CA is the chronological age. If 80≤IQ≤140 for a group of 12 yr children, find the range of their mental age.
A milk of 80% concentration is diluted at home by the seller by adding some water to it so that milk concentration is reduced between 65% to 70%. If 640 litres of milk of 80% concentration is available, how much water has been added? Which value system the seller is lacking.
A company manufactures cassettes. Its cost and revenue functions are C(x)=26000+30xand R(x)=43x, respectively, where x is the number of cassettes produced and sold in a week. How many cassettes must be sold by the company to realise some profit?