What is the sum of five and four ninths and seven and five ninths

5 4/9 + 7 5/9 = ???

5 + 7 = 12

4/9 + 5/9 = 9/9 = 1

12 + 1 = 13, so in conclusion, the answer is 13!
Hope this helped!

5 4/9 + 7 5/9            You can split this problem into two parts to make it easier.
(5 + 7) + (4/9 + 5/9)   Do the whole numbers first.
12 + (4/9 + 5/9)           Now do the fractions.
12 + 9/9                       9/9 can be simplified to 1.
12 + 1                           Now, add the two numbers together.
13   

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )