Fill in the missing number:
497 +
= 1,404

907

Step-by-step explanation:

1,404 - 497=907

907

Step-by-step explanation:

let x be the missing number

if 497 + x = 1404

you isolate the x

x=1404-497

x=907

you can check the work on a calc to see if 497 +907 = 1404 :)

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

part a: 1.08

part b: 27.59