Write two ways to group and add 2+3+4

For which rational expression is -2 an excluded value of x?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?