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ACT test scores are approximately normally distributed. Last year, the scores had a mean of 21 and a standard deviation of 3.4. What is the range
of scores that encompassed 95% of all the scores?
10.8 to 31.2
14.2 to 31.2
10.6 to 24.4
14.2 to 27.8
17.6 to 24.4
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the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

42.4 6th grade students prefer hip hop

step-by-step explanation:

40 percent of 106 = 42.4

2.14x - 12.18 = -5.76

add 12.18 to each side

2.14x -12.18 +12.18 = -5.76 +12.18

2.14 x =6.42

divide by 2.14

2.14x/2.14 = 6.42/2.14

x=3