pls tell me how to solve this!

Question

0

595

2

+11912

6.Using indentities, evaluate.

ix). 1.05 x 9.5

any help?

rosala Dec 28, 2014

+33616

+15

Best Answer

Do you mean the following:

Let 1.05 be (1 + 0.05) and 9.5 be (10 - 0.5) so 1.05*9.5 = (1 + 0.05)*(10 - 0.5)

This is 1*10 -1*0.5 +0.05*10 - 0.05*0.5 or 10 - 0.5 + 0.5 - 0.025 or 10 - 0.025 or 9.975

.

Alan Dec 28, 2014

Alan · Answer 1 · 2014-12-28T10:35:56

Do you mean the following:

Let 1.05 be (1 + 0.05) and 9.5 be (10 - 0.5) so 1.05*9.5 = (1 + 0.05)*(10 - 0.5)

This is 1*10 -1*0.5 +0.05*10 - 0.05*0.5 or 10 - 0.5 + 0.5 - 0.025 or 10 - 0.025 or 9.975

.

rosala · Answer 2 · 2014-12-28T10:40:01

yes i meant that!thanks alan!