A 400g sample of a compound at a lab was found to contain 52.8% carbon, 38.4% oxygen, and 8.8% hydrogen. How many grams of hydrogen does the sample contain?

i dont know men

step-by-step explanation:

answer: (3,11) is your answer.

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4

answer: 12x^2+6x

step-by-step explanation:

6x does not equal 24x. hope it works!