The plus-minus sign (Â±) is a mathematical symbol with multiple meanings. 1  In mathematics, it generally indicates a choice of exactly two possible values, one of which is the negation of the other. In engineering the sign indicates the tolerance, which is the range of values that are considered to be acceptable, safe, or which comply with some standard, or with a contract. 2  In chemistry the sign is used to indicate a racemic mixture.
In order for this to be an option, homeowners should have some spare carpet available for the professional to use. It is vital to have a matching carpet sample, or the patch won't be an effective repair. The average cost of a small patch repair, when done in the home, should run between $178 and $218. In some cases, a small patch simply won't be able to cover up the affected area. Whether there is a stain caused by a pet or a snag turned into an unsightly hole, a larger repair may be necessary.
How much drywall should cost. Average costs and comments from CostHelper's team of professional journalists and community of users. Patch kits to repair small holes in existing drywall are $2-$20; the more expensive kits contain materials to patch several holes or up to four feet of cracks. Simple repairs can also be made using joint compound ($3-$15), a drywall hand saw ($5-$16) and average household tools such as a hammer, drill and utility knife.