Pls answer this quick
after stepping into a room with unusual lighting, lamont's pupil has a diameter of 8 millimeters. what is the pupil's radius?

answer:

3 3/4 lbs

step-by-step explanation:

there are 16 ounces in 1 pound

60 ounces * 1 lb/ 16 ounces = 60/16 lbs

divide by 4 on the top and bottom

15/4 lbs

changing this to a mixed number

4 goes into 15 3 times   with 3 left over

3 3/4 lbs

answer: a dependent variable is a variable (ex.x,y,z) that is dependent on the independent variable. the dependent variable is what is being measured in an experiment or evaluated in a mathematical equation.a variable in an equation that may have its value freely chosen without considering values of any other variable

step-by-step explanation:

answer:

x = 6, y = -11

step-by-step explanation using the substitution:

solve the following system:

{y = 7 - 3 x

{x = -2 y - 16

hint: | perform a substitution.

substitute y = 7 - 3 x into the second equation:

{y = 7 - 3 x

{x = -2 (7 - 3 x) - 16

hint: | expand the right hand side of the equation x = -2 (7 - 3 x) - 16.

-2 (7 - 3 x) - 16 = (6 x - 14) - 16 = 6 x - 30:

{y = 7 - 3 x

{x = 6 x - 30

hint: | choose an equation and a variable to solve for.

in the second equation, look to solve for x:

{y = 7 - 3 x

{x = 6 x - 30

hint: | isolate x to the left hand side.

subtract 6 x from both sides:

{y = 7 - 3 x

{-5 x = -30

hint: | solve for x.

divide both sides by -5:

{y = 7 - 3 x

{x = 6

hint: | perform a back substitution.

substitute x = 6 into the first equation:

{y = -11

{x = 6

hint: | sort results.

collect results in alphabetical order:

answer: x =6, y = -11  

answer:

a. 3 inches

step-by-step explanation:

the radius bc and the tangent ab form a right angle, so triangle abc is a right triangle. bc and cd are radii of the same circle, so they are congruent.

a^2 + b^2 = c^2

(bc)^2 + (ab)^2 = (cd + ad)^2

let the radius bc = cd = x.

x^2 + 4^2 = (x + 2)^2

x^2 + 16 = x^2 + 4x + 4

16 = 4x + 4

12 = 4x

x = 3

answer: 3 inches