In order to find the product 38. 42, a student uses the expression (40 - 2)(40+2). Which expression is equivalent to 10 – 2)(40+2) I need the exact answer.

i would say b) is your answer

sorry if im wrong

step-by-step explanation:

answer: 0.26

i used the calculator on google

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.