Which expression is equivalent to -1/4x + 1/2?

A. -1/4 (-x + 1/2)
B. 1/4 (-x + 1/2)
C. -1/4 (x + 2)
D. 1/4 (-x + 2)

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

Which shows a reasonable estimation for 124% of 42 using the distributive property?