a) Z-score for Patrisse test grade is 0.7288
b) z-score for Makayla test grade is -0.7441
c) Patrisse did better.
<h3>What is z- score?</h3>
A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.
Z-score for Patrisse test grade.
X= 81.4, 
= 72.8, 
= 11.8
Z= x- /
Z= 81.4 - 72.8/ 11.8
Z= 0.7288
Now, z-score for Makayla test grade.
X= 60.6, = 67, = 8.6
Z= x- /
Z= 60.6 - 67/ 8.6
Z= -0.7441
Hence, Patrisse did better as she had better z- score.
Learn more about this concept here:
brainly.com/question/23261840
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I would start by converting everything into decimal, as it makes it a LOT easier to understand.
So, you should be able use a calculator to convert the square roots and fractions into decimal. Let's start.
Square root 12 is equivalent to 3.46 (to 2 decimal places)
Square root 9 is 3 (you should know that because 3 × 3 = 9)
12 is already in decimal so it's just 12
3.56, 4.03 and 4.2 are also in decimal so you leave them
Square root 17 is 4.12 (to 2 decimal places)
Square root 2 is 1.41 (also 2 decimal places)
1/2 is the same as 0.5 (once again, you should know that)
And 3/2 is the same as 3 ÷ 2, which is 1.5.
So in order of least to greatest, it's:
1/2, square root of 2, 3/2, square root of 9, square root of 12, 3.56, 4.03, square root of 17. 4.2 and finally 12.
Hope this helps :)
Product means the answer from multiplying something, and Janelle'sheight times 7 = 126. so lets set this up like an equation.
We will make Janelles height "x"
x*7=126
to solve we divide by 7.
127/7= 18
therefore if we plug in 18 as x
(18)*7=126
and multiply
126=126
janelle's height is 18
