Determine whether each statement is true or false. For a real number x, x · 0 = x.

For a real number x where x ≠ 0, x () = 1.

For two different real numbers x and y, |x - y| = |x + y|.

For real numbers x, y, and z, (x + y)(z) = (xz) - (yz).

For rational numbers x and y, where y ≠ 0 is always a rational number.

1) false

2) true

3) false

4) false

5) false

Step-by-step explanation:

x * 0 = 0

x * (1) = 1

(x + y ) first and ( x - y )

( x + y ) ( z ) = ( x * z ) + ( y * z )

drop out of school or go to quizlet, quizlet is better

step-by-step explanation:

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!