What is the area of this triangle?

enter your answer as a decimal in the box. round only your final answer to the nearest tenth.

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)