Simon has 45 books evenly spread in 5 cartons. he gave books to readers from one cartons. the first readers got 3 books and the second reader got 4 books. how many books are remaining in one cartons? answer

45 in 5 even cartons, so 9 per one. 4+3 =7. 9- 7=2. 2 per carton

So first Simon has in total 45 books. He spreads them into 5 cartons. So you can do 45 divided by 5 = 9. Now there is 9 books in each of the 5 cartons. Look and check: 9 x 5 = 45! Now one reader got 3 books. So 45 - 3 = 42! Simon has 42 books left for now.  Now another reader comes and takes away 4 books! 
42 - 4 = 38!  Their are 4 cartons remaining and 38 books left! I hope that helps! :)

Answer: question no. 1 -a. yes, the sides are in the ratio 2 : 5.question no. 2 -b. 59°question no. 3 -c. angles x and y are remote interior angles.question no. 4 -d. 90°, 45° and 45°question no. 5 -b. mn and qrstep-by-step explanation: question no. 1 -rs : xu = 3 : 7.5 = 2 : 5rt : x? = 6.4 : 16 = 2 : 5st : u? = 6 : 15 = 2 : 5as the ratios of all sides are equivalent, the triangles must be congruent and the sides must be proportional.therefore, the answer is: a. yes, the sides are in the ratio 2 : 5.question no. 2 -in the second diagram, angle b is the only letter not shown. therefore, the number must be equivalent to angle b.if we substitute the value of angle b as being 22° in the first diagram, we can now use the angle sum of a triangle to obtain the value of angle a.angle sum of a triangle = 180°therefore: let angle a = aa + 99 + 22 = 180a = 180 - 99 - 22a = 59°therefore, the answer is: b. 59°question no. 3 -angles x and y don't share the vertex of the triangle with the exterior angle w. remote interior angles don't share a vertex of a triangle with an exterior angle. this means that angles x and y are remote interior angles.therefore, the answer is: c. angles x and y are remote interior angles.question no. 4 -the sum of all interior angles of a triangle must be equivalent to 180°.90°, 45° and 45° are the only set of angle measures that are equivalent to 180°.therefore, the answer is: d. 90°, 45° and 45°question no. 5 -the only pair of sides stated in the options which are corresponding are mn and qr.therefore, the answer is: b. mn and qr.