An experimenter is interested in the effect of expectations and drugs on alertness. each participant is given an amphetamine (stimulant) or a placebo (an inert substance). in addition, half in each group are told that the drug taken was a stimulant and half that the drug was a depressant. an alertness score for each participant is obtained from a composite of measures that include a questionnaire and observation.

it is true

step-by-step explanation:

all the combinations add up i used   calculator

x ≥ 18 is your answer

step-by-step explanation:

let "a number" = x

(2/3)x + 17 ≥ 29

isolate the variable (x). do the opposite of pemdas (parenthesis, exponent (& root), multiplication, division, addition, subtraction).

first, subtract 17 from both sides.

(2/3)x + 17 (-17) ≥ 29 (-17)

(2/3)x ≥ 29 - 17

(2/3)x ≥ 12

next, multiply 3/2 to both sides to isolate the x

(3/2)(2/3)x ≥ 12(3/2)

x ≥ 12(3/2)

simplify. multiply, then divide

x ≥ (12 * 3)/2

x ≥ (36)/2

x ≥ 18

x ≥ 18 is your answer

~

step-by-step explanation: