D=6 or 3x2 and R= 3.14 should be correct! hope this helps
Complete Question
The complete question is shown on the first uploaded image
Answer:
The score of the student is x = 779.42
Step-by-step explanation:
Generally we can mathematically represent the z-score as
Here x is the score of the student
substituting 1045.7 for the Mean, 221.9 for the stDev and -1.2 for z we have
=>
=> x = -266.28 + 1045.7
=> x = 779.42
Given:
To find:
The simplified rational expression by subtraction.
Solution:
Let us factor . It can be written as .
using algebraic identity.
LCM of
Make the denominators same using LCM.
Multiply and divide the first term by (x + 1) to make the denominator same.
Now, denominators are same, you can subtract the fractions.
Expand .