Which of the following is the best term for the type of experiment described below? 50 people are randomly selected to participate in a clinical drug trials in which one half will receive the actual drug and the other half will receive a placebo. Neither the researchers conducting the experiment nor the subjects participating will know who receives switch

A. Randomized experiment

B. Controlled experiment

C. Biased Experiment

D. Double blind experiment

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

it would be 6xy and -16xy.

can you rephrase the question ? it is unclear : -)

step-by-step explanation: