Question

Write an expression for

a) an unknown number subtracted by 17 ( just the answer)

b) perimeter of a rectangle with base 3x + 9 and the height one-third of the base length. Simplify even the expression! Present your solution.

Answer 1

17-x

Answer 2

2(h+b)
b=3x+9
h=(3x+9)/3
=3(x+3)/3
=x+3
so
2(3x+9+x+3)=(4x+12)2
=8x+24

Answer 3

so do i write the answers like this?

A) 17-x??

and

B)

2(h+b)
b=3x+9
h=(3x+9)/3
=3(x+3)/3
=x+3
so
2(3x+9+x+3)=(4x+12)2
=8x+24

Answer 4

yup..

Answer 5

in b) , where does the number 2 comes from? ... omg, i suck..

Answer 6

its the formula..
2(h+b)

Answer 7

perimeter of recangle

Answer 8

O.o i suck ! lol thank u as always nirmalnema!!! <3

Answer 9

welcome