How many solutions does 2x+ 2x+ 2=4+2x have a) 0 b) 1 c) infinite d) cannot be determined

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle