Which expressions are equivalent to -1/4 (16-12+8x)?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us