It depends where you are sending it from and where you are sending it to. Mailing it from Buenos Aires to somewhere else in Buenos Aires is relatively inexpensive. Mailing it from Buenos Aires to Kazakhstan costs a lot more.
The cost to send a padded 4x7 envelope depends on several factors, including the destination, weight, and the shipping carrier you choose. For example, in the U.S., using USPS, it could cost around $3 to $5 for First-Class Mail, while Priority Mail rates may start at around $8. It's best to check the specific carrier's website for accurate pricing based on your envelope's weight and destination.
2x7=14double = 4x7= 28
28
4x7=28 2(4x7)=2x28=56
32
4x7=28(4x7=2x28=56
-6x3 + 4x7 - 0.8x2 + x4 - 5x5 = 4x7 - 5x5 + x4 - 6x3 - 0.8x2 = x2 (4x5 - 5x3 + x2 - 6x - 0.8)
You can use the product from 4x7 to find the product of 8x7 by doubling the answer to 4x7. The product of 4x7 is 28 and the product of 8x7 is 56 (28 doubled is also 56).
the answer for 4x76 is 304
Double it.
50
4x7=34