Equation: 2 (1/2x + 1) = -3 (2x - 1) +4 (2x + 1)

Answer Choices:

A. 5

B. All real numbers

C. No solution

D. None of the above

I got D but I wanted some confirmation. I feel like I got it wrong... Thanks!

Step-by-step explanation:

2(1/2x+1) = -3(2x-1)+4(2x+1)

Distributive Property 1x+2 = -6x+3+8x+4

Combine Like Terms. 1x+2 = 2x+7

Subtract 1x from both sides 2 = x+7

Subtract 7 from both sides -5 = x

Thus the solution is non of the above

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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