What is 5x times 5x times 5x7 envelopes

what is 5x times 5x times 5x7 envelopes

5 x 1 = Other Multiplication Tables: 1x. The Multiplication and division Chart above is aligned, either partially or wholly, with the standard from the Common Core Standards For Mathematics (see the shortened extract below). Missing: 5x7 ‎ envelopes.
You can put this solution on YOUR website! Directions on little brother's lesson is: Write each expression using a single exponet. Problem is: 1)(5x) (to the Missing: 5x7 ‎ envelopes.
20¢ extra per print for cropping 5X, 4X, 3X, & 2X size. 31/2 x 31/2 (From square negatives)....35 ea. 31/2 x 5 ...40 ea. 5x7 . . materials, inks, filing envelopes (namely glassine and low-grade paper), wood, nitrated and business-hours extension: other times, the extension is.
what is 5x times 5x times 5x7 envelopes