6(b-5)=12 a 7/8 b 17/6 c 3 d 7

tell me how you got it plzz

6(b-5) = 12

multiply six with both numbers in brackets.

6b-30=12

6b = 12 + 30

-30 became +30 because it was moved to other side of equal sign.

so6b = 42

b=42/6 = 7

SO THE ANSWER WILL BED.

GLAD TO HELP ! :)

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: