Which is the correct algebraic expression after combining like terms? 6+ SX-7-X
O 7X-1
O 7x+ 13
O 9x-1
9x+ 13.

I’ll give you brainlist if your the first person to answer!

55? i think maybe

step-by-step explanation:

the correct is answer is a 9-sided polygon!

linear pair postulates

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: