A rational number is a number that can be written into a fraction. pi, some square roots, e, etc., are irrational numbers(numbers that cannot be written into a fraction).
Answer:
Yes they are congruent
Step-by-step explanation:
You know this because of the angle that is marked. You can also know this because of the length of the sides and how its only a rotation of 180 degrees
Answer:
c) 
Step-by-step explanation:
Equation for regression line of y on x is given as

where
= predicted value
m = slope of line
b = intercept
m and b are found as

r = correlation coefficient = 0.88
Sx = standard deviation for independent variable x = 13
Sy = standard deviation for dependent variable y = 27
= mean value of independent variable x = 21
= mean value of dependent variable y = 55
Substituting these values in (2) and (3)


Putting these values of m and b in (1)

Answer:
It would be D
Step-by-step explanation:
All the coordinates are divided by half.
Answer:
The temperature increased by 15 degrees 6+9=15
Step-by-step explanation:
Hope it helps