Mr. D'Alton made some radium in his lab. He used 2/5kg of the radium every time he ran his experiment. If he did the experiment four times and had 2 1/3 kg left, how much radium did Mr. D'Alton make at first?​

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Zroms according to the synthetic division below, which of the following statements are true? check all that apply. 352 -2 6 -12 12 2 4 0 i a. (x-3) is a factor of 2x2 - 2x - 12. b. the number 3 is a root of f(x) = 2x2 - 2x - 12. c. (2x2 - 2x - 12) = (x + 3) = (2x + 4) d. (2x2 - 2x-12) - (x-3) = (2x + 4) e. (x+3) is a factor of 2x2 - 2x - 12. o f. the number -3 is a root of fx) = 2x2 - 2x - 12. previous