Simplify the expression:
– 10x + – 4 – 8 + 7x

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

We must first determine the shape of a rectangular prisms _ a0 to find area of the prism

Math i have no idea how to do a and b