Please help its for a test

What is 1/2 x (6 x 4)+3 + 2 show your work

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin