Which expression represents the area of a rectangle with
sides measuring 7x4y2z units and
2xy5z14?

______________________________

Note:

 - It doesn't matter which measurement fills the height or width part in the formula.

Equation at the end of Step 1:

Note:

 - To multiply powers of the same base, you can add their exponents. So you just do .

 - When you have a plain variable like , you can assume .

Equation at the end of Step 2:

Note:

 - To multiply powers of the same base, you can add their exponents. So you just do .

Equation at the end of Step 3:

Note:

 - To multiply powers of the same base, you can add their exponents. So you just do .

 - When you have a plain variable like , you can assume .

Equation at the end of Step 4:

Note:

- Since we combine all the powers and multiplied the bases, all you have to do is put it all together in 1 form like we were doing after we added powers in the earlier steps.

Equation at the end of All Steps:

______________________________

28

step-by-step explanation:

because that's the answer

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!