To solve the equation below by completing the square what is the first step?
4x^2+16x=20

a. add 8 to each side of the equation.
b. add 64 to each side of the equation.
c. multiply both sides of the equation by 1/4.
d. multiply both sides of the equation by 1/8.

The frequency table shows a set of data collected by a doctor for adult patients who were diagnosed with a strain of influenza. patients with influenza age range number of sick patients 25 to 29 30 to 34 35 to 39 40 to 45 which dot plot could represent the same data as the frequency table? patients with flu

Pranza plotted point a in the coordinate plane below.

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics