You guyss know it's math
in the expression -9x - 2 x^2 +7 what us the coefficient of x?
-9
-2
9
7
plz

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?