Please answer the question in the photo attached. Also, explain how to solve it so I know how to solve the next.

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2