Answer:
A. y + 1 = -2(x-2)
Step-by-step explanation:
point-slope equation is : y - y1 = m (x -x1)
remember m= slope value
the given point is (2, -1) therefore we can substitute the values in:
y + 1 = m(x -2)
now to make sure our answer is complete we will solve for the slope:
looking back at the graph, the y-intercept value is 3, therefore we have a point of (0,3) and (2, -1)
with any two points you can determine a slope.
y2 - y1 / x2 - x1
therefore :
-1 -3 / 2 - 0
-4 / 2 = -2
therefore our m value is -2
this makes the completed point-slope equation:
y + 1 = -2 (x - 2) or A
Completing the square will always work for any quadratic, because you can always manipulate any quadratic by following completing the square.
You substitute the variables with the number into the equations and set the equations equal to each other and solve ( systems of equations )
Answer:
15 litres
Step-by-step explanation:
129.6 m² needs 8L
1m² needs 8/129.6L
243m² needs (8/129.6)×243 = 15L
Answer:
Step-by-step explanation:
total gallon be filled in one minute =40 gallon
to fill half full you have to fill gallon =24000/2
=12000 gallon
Total time taken to fill 12000 gallon = 12000/40
=300 minutes.
or 5 hours
