The sum of the digit of a two digit number is 8 and the difference between the number and that formed by reversing the digits is 18 find the number

The number is 53.

Step-by-step explanation:

If the digits are x and y where x is the first digit  then we have the equations:

x + y = 8(1)

10x + y - (10y + x) = 18

9x - 9y = 18

Dividing through by 9:

x - y = 2(2)

Adding (1) and (2):

2x = 10

x = 5

and y = 8 - 5 = 3.

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls