The model below represents 2 x + 1 = negative x + 4.

2 green long tiles and 1 green square tile = 1 long red tile and 4 square green tiles

What is the value of x when solving the equation 2 x + 1 = negative x + 4 using the algebra tiles?

x = negative 3
x = negative 1
x = 1
x = 3

step-by-step explanation:

80 the answer is 80

step-by-step explanation:

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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true

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