1.)A piece of wooden rod is 48 cm. long is divided into three parts. The 2nd part is longer than the 1st part by 1cm.,while the 3rd part is 2cm. longer than the 1st part.How long is each part?
2.)The perimeter of a rectangular vegetable garden is 54cm. If the length of the rectangle is 3cm. longer than its width.Find the dimensions of the garden.
please show your solution..^^.
write the representation,equation and solution and final answer/s..hehhe,,
2006-12-12 23:29:47 · 3 answers · asked by maye29 2 in Education & Reference ➔ Homework Help
1. let x=first part
x+x+1+x+2=48
3x=45 (subtracted 3 and added like terms)
x=15 (divided by 3 both sides)
so the answer is 15cm, 16cm, and 17cm
2.let x=width
x+x+3+x+x+3=54
4x=48 (subtracted 6 and added like terms)
x=12
so answer is length is 15, and width is 12
2006-12-12 23:36:53 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1)
x+ (x+1cm) + (x+2cm) = 48cm
3x + 3cm= 48cm
3x = 48cm - 3cm
3x = 45cm
x= 45cm/3
x= 15cm
So, 1st part is 15 cm, 2nd part is 16cm and 3rd part is 17cm
2)
2a + 2b = 54cm
b = 3cm + a
2a + 2(a + 3cm) = 54cm
2a + 2a + 6cm = 54cm
4a + 6cm = 54cm
4a = 54cm - 6cm
4a = 48cm
a= 48cm/4
a= 12cm
So, b= a+3cm = 12cm+3cm=15cm
2006-12-13 07:37:36 · answer #2 · answered by acca 5 · 0⤊ 0⤋
1)15cm, 16cm, 17cm!
2)Length: 15cm
Width:12cm
2006-12-13 07:35:15 · answer #3 · answered by Roubini 5 · 0⤊ 0⤋