Another Algebraic Problems?
Solve the ff. problem.
1) The cost of a ballpen is 3x-2 centavos. Represent the cost in pesos of x square+2x ballpens.
2) The base of a triangle is 5x-7 cm and the altitude is 3x+2 cm. What is the area?
3) The average weight of 4x+1 boys is x+5 kg. What is their total weight?
4) A loaded truck has a weight of "2x cube-4x square+10x+7" kg. If the load alone is "x cube+3x square+5x-2" kg, what is the weight of the truck?
5) Three times a number is the same as 27 added to 6/5 of the number.
Best Luck. Thank You for answering
2007-06-16 05:51:13 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3) Total weight = average weight x number of boys
= (x + 5) (4x + 1) = 4x^2 + 21x + 5
4) Weight of the truck = total weight - load
2x^3 - 4x^2 + 10x + 7 - x^3 - 3x^2 - 5x + 2 (signs of second expression get reversed)
= x^3 - 7x^2 + 5x + 9 is the weight of the truck
2007-06-16 06:02:17 · answer #1 · answered by Swamy 7 · 0⤊ 0⤋
3) Total weight = average weight x number of boys
= (x + 5) (4x + 1) = 4x^2 + 21x + 5
4) Weight of the truck = total weight - load
2x^3 - 4x^2 + 10x + 7 - x^3 - 3x^2 - 5x + 2 signs of second expression get reversed!
x^3 - 7x^2 + 5x + 9 is the weight of the truck !
2007-06-16 13:02:52 · answer #2 · answered by Nav 4 · 0⤊ 0⤋
the answer to 5th is 15
2007-06-16 13:31:33 · answer #3 · answered by anushka 1 · 0⤊ 0⤋
http://www.mathfiles.com/
2007-06-16 12:59:31 · answer #4 · answered by deesnuts 5 · 0⤊ 0⤋