Arectangular section of a wall in a library is 90 in. long and 72 in. wide. a librarian is hanging photos on this section of the wall. each photo needs a space of approximately 8 in. by 10 in.
which estimate best approximates the number of photos that can be hung on the section of the wall?
a. 80
b. 160
c. 650
d. 810

A. 80

Step-by-step explanation:

Length of rectangular section of a wall = 90 inches

Width of rectangular section of a wall = 72 inches

Area of rectangular section of a wall =

                                                             =

                                                             =

Each photo needs a space of approximately 8 in. by 10 in.

So, area of each photo =

                                       =

                                       =

Now he number of photos that can be hung on the section of the wall:

So, 80  estimate best approximates the number of photos that can be hung on the section of the wall.

answer: 12

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: