Answer: (i) 4x - 40 = 76
(ii) 29 questions
Step-by-step explanation:
Let the total number of questions be x.
Since he received 4 points for every correct answer and he got 10 answers wrong , this means he lost 40 points , the equation thus become
4x - 40 = 76
To find the value of x , add 40 to both sides
4x = 116
divide through by 4
x = 29
Therefore , there are 29 questions on his math test
Answer:
Step-by-step explanation:
Purple
pink
or cyan
Example: In a survey of women in a certain country (ages 20-29) the mean height 63.7 inches with a standard deviations 2.65 inches. What is the height that represent 85 perentile ? what is the height represent First quartile
answer: in a survey of women in a certain country (ages 20-29) the mean height 63.7 inches with a standard deviations 2.65 inches.
What is the height that represent 85 percentile ?
Find the z-value of the 85th percentile::
invNorm(0.85) = 1.0364
Find the corresponding height value::
h = z*s + u
h = 1.0364*2.65 + 63.7
h = 66.47"
