1. The perimeter of a rectangle is 78 cm. The length is 3 greater than twice its width. Find the dimensions.
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translate this into math equation `The length is 3 greater than twice its width. `
let length = L
and width = w
greater than means + sign
is means `=` equal sign now translate that plz
and perimeter of a rectangle
replace p with given perimeter
yes that's how we get 2w+2W= P
what is the perimeter in that question ?
replace p with that
but how do i get the number? add or what?
you need two equation to get the length and width
first one is 2w+2L= 78
perimeter is 78 so replaced p with 78
now translate 2nd equation which is ` The length is 3 greater than twice its width`
hoe do u get 70? thats what im trying to fugure out..
70 or 78 ?
the equation we use for perimeter of rectangle is 2w+2L= P ( where p is perimeter
L is length and w is width)
now read the first sentence of the question
`The perimeter of a rectangle is 78 cm`
Perimeter = P which is 78
so i replace p with 78 in this equation `2w+2L=78`