The equation of the line is y= 3x
Answer:

Step-by-step explanation:
To find the slope of the two points (-9,-3) and (7, -7) w have to use the slope formula
can also be written as a decimal 
we get - 1/4 because -4 divided by -4 is 1 and -4 divided by 16 is -4
Answer:
option 3
Step-by-step explanation:
divide the diameter by 2 to get the radius.
pi×r^2
3.14×42^2=5538.96 km^2
Answer:
sqrt(3)
Step-by-step explanation:
Pythagroean theorem shows that x^2+sqrt(2)^2=sqrt(5)^2
In other words,
x^2+2=5
x^2=3
x=sqrt(3)
Answer:
-5
Step-by-step explanation:
This is a quadratic polynomial that has the form ax²+bx+c :
here the coefficient of b is -5