If f(x) = -3x-2, find the value

f(-2)+9

13

Step-by-step explanation:

f(-2) means you want to find the y value when x=-2. Plug in x=-2 into the f(x) equation to get: [-3(-2)]-2 = 6-2 = 4.

so f(-2)=4

But the question asks for f(-2)+9. So you add 9 to f(-2) which is 9+4 = 13

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

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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