Aquadrilateral has an angle that measures °77 °180 and °65 what is a measure of the fourth angle

What signals you that factoring by grouping is the best method to use when factoring a problem?

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.