Need with these questions. show your work. im using 30 points for these questions.

In the first question you have to add the width of bookcase A, B, and C, you will get 334. Now you want to subtract 456 - 334 = 122. 122 is how much space is left, since bookcase D and E are the same width just divide 122 by 2 which is 61. So bookcase D and E have a width of 61 centimeters.

In the second question the height is 1.99 ft. If you multiply 1.99 with 1.33 and 4 you will get 10.66.

I don't know the third question sorry

1) the answer would be 61 for each bookcase. you add the others and subtract them from the total length of the wall, then divide by 2 since they will be the same size.

Ithink it's the first one ( let me know if it right)