How do I delete E-mail from the inbox on my Tablet?

First, you are not giving any email name like, gmail, yahoo etc...

anyway, this is the way to delete emails from an Gmail account:-

1. Delete all emails

Deleting all your emails in Gmail is simple: open Gmail, select the inbox tab you want to clear out (Primary, Promotions, etc.) and click the small empty box in the top left corner, just above the Compose button. This will select everything on the current page of your inbox. If you have more than 50 emails then you will also need to click 'Select all XXX conversations in Primary' (XXX will be the total number of emails, while Primary will be Promotions or Social if you're clearing out a different inbox tab).

Click the rubbish bin/trashcan icon to delete all of them. They'll be moved to Gmail's Bin, so you can always head there to get anything you didn't want to delete back. Be warned, Gmail removes items from the Bin after 30 days. You can use this technique to make a more refined selection and delete specific emails.

2. Delete email from a label

If you've got emails in labels, you can delete all of your emails in a similar way to Step 1. Select the Label you want from the left-hand panel and then use the tickbox near compose to select all of the messages on one page. If you've got more email, click the 'Select all XXX conversations…' link to select everything. Then hit the Delete button to move everything to the Bin.

3. Delete all email from one contact

If you want to find and delete all email from a contact, just search for that contact. When you've found an email from them, hover the mouse over their name to bring up a pop-up window, then click Email. This will list all emails to and from that person. You can select all of the emails and delete them, in the same way as for Step 3. If you only want to delete email that you sent to that person, or that you received from them, skip to Step 5 to find out how.

4. Delete all unread email

To delete all Unread email, type is:unread or lable:unread into the Search box. This will find any emails that are marked as unread anywhere. Again, you can select and delete all of your emails using the instructions in Step 1. You can use the similar is:read to find all read email, if you only want to leave the messages that haven't got around to reading yet. If you want to only delete unread email from one person or from one label, Step 5 shows you how.

5. Delete all email using a search

As we saw from Step 4, using the Search bar can help you find specific emails. The trick is to know what to type. Here are the most common commands: Label:<name of label> gives you all email from one label, such as label:inbox to search just your inbox; To:<email address>, lets you search for all messages to a person; From:<email address> finds all messages from a person. Don't forget, you can chain multiple requests, so: label:inbox is:unread from:bill@microsoft.com' would find all unread email from Bill Gates in your inbox. You can also use 'OR' between search terms. In the example above it would find all email in your inbox, all unread email, all email in your inbox and all emails from Bill Gates, regardless of where they're located. Once you've narrowed your search down, you can select all of the emails that are returned and delete them in one go.