It Is the number x2, then +1. so 30x2+1
Answer:
is number 3
Step-by-step explanation:
see explanation on the attached
hope it helps
Answer:
Predicted final score of Josh 
Step-by-step explanation:
The linear regression relationship has been established between the final-exam score and the score on the first test
The relation ship is represented by a linear equation -

Where
score on the first test
final-exam score
Substituting the value of
in above equation we will get -

Predicted final score of Josh 
Since 1 km is 100,000 cm there are 39,400 inches in a kilometer
Given that,
Total number of children = 65
The ratio of boys to girls is 3 :2.
To find,
The number of girls in the grade.
Solution,
Let there are 3x girls and 2x boys.
ATQ,
3x + 2x = 65
5x = 65
x = 13
So, no of girls = 3x
= 3(13)
= 39
Hence, there are 39 girls in the grade.