Find the missing angle according to the Triangle Sum Theorem.

100

Step-by-step explanation:

A triangle would add up to 180 degrees, therefore you would just follow the steps below for this problem:

35+45= 80

80+x=180 (subtract 80 from both sides)

x= 100°

x=100

Step-by-step explanation:

The sum of a triangle is always 180 so you'd add the given number together which would be 80 and subtract the from 180 so it would look like this 45+35+x=180

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: