Plz help me i really do need the help Each of the problems below was solved incorrectly, for each problem, find the mistake in the work/ answer. Explain what the mistake is, and find the correct answer.

3. Find the value of x

Explain the mistake:

Find the correct answer(equation):

Step-by-step explanation:

this is wrong because

since they are linear pair (formed when a line intersect on a straight line .)The sum of two angles is equal to 180 degree .They are not corresponsing.OR u can explain as

In supplementary angles two angles should be added .so the two angles sum must be 180 degree.

correct solution

115+5x-10=180

105+5x=180

5x=180 -105

x=75/5

x=15

x = 15

They solved it as if these are vertical angles which they aren't this is a supplementary angle meaning it will add up to 180 degrees so...

180 - 115 = 65 5 × 15 = 75 75 - 10 = 65 therefore x = 15 hope that helps!

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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