Qual o monômio deve ser adicionado a x(ao quadrado)+8xy para obter (x+4y)(ao quadrado)

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?