An element with mass 670 grams decays by 21.8% per minute. How much of the element is remaining after 15 minutes, to the nearest 10th of a gram?

the answer to your question is 10-5x+3r

the slope of a line is defined as the rise over the run.it is the change in y divided by the change in x .

if y increases for every increase in x then the slope of line is positive or we can say   y always decreases when x decreases .

the graph of the line starts at the bottom left and goes towards the top right.

for negative slope   y always decreases when x increases and y always increases when x decreases.

the slope of any horizontal line is 0.the slope of any vertical line is undefined.

in the given graph the graph starts at the bottom left and goes towards the top right and so slope is positive.

among all the given options the slope of line can be and 3.

the answer would be

360 divided by 30

well if you have a score of 91 and you got a 53 on a test that is 20% of your grade so,

you would subtract 20% from 91 and a get 90.8 so, your answer would be,