Answer:
y = 2x - 7
Step-by-step explanation:
To find the line equation we assume that its form is y = m*x + b. Where m is the slope and b is the independent variable that intercepts the Y axis.
If we have two points as P1=(x1,y1) and P2=(x2,y2) we can use the slope formula as:
m = (y2-y1)/(x2-x1)
The points given are P1=(7,7) and P2=(2,-3), then the using the slope formula we obtain:
m = (-3-7)/(2-7)
m = (-10)/(-5)
m = 2
By now the equation is y = 2x + b. To find the value of b we have to replace in the equation any point, in this case i am using P2:
-3 = 2*(2) + b
-3 = 4 + b
-3 -4 = b
-7 = b
Therefore the equation of the line is:
y = 2x - 7
Answer:
$15
Step-by-step explanation:
if one pound is $5 and we need 3, then we can multiply the price of one pound by 3. (3×$5) This gives $15
Answer:
The Surface area of the moon is 
Step-by-step explanation:
Given:
Diameter of the moon = 3.8 x 10 to the 8th
To Find :
The surface area of the moon = ?
Solution:
The moon is in the shape of of the sphere .
So the surface area of the moon = surface area of the sphere
The surface area of the sphere = 
Where r is the radius of the sphere
Radius , r = 
r = 
r = 
Now the surface area of the moon with radius r = is
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