A horizontal line through 3 on the y axis
X^2 + 4x – 7 = 0 Pls n thx
1 answer:
Answer:
x = - 2 ±
Step-by-step explanation:
To solve the equation using the method of completing the square.
Given
x² + 4x - 7 = 0 ( add 7 to both sides )
x² + 4x = 7
add ( half the coefficient of the x- term )² to both sides
x² + 2(2) x + 4 = 7 + 4
(x + 2)² = 11 ( take the square root of both sides )
x + 2 = ± ( subtract 2 from both sides )
x = - 2 ± ← exact solution
You might be interested in
Answer:
Step-by-step explanation:
let the 3rd side, the hypotenuse, be x
Using Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² = 2² + 3² = 4 + 9 = 13 ( take square root of both sides )
x =
Answer: 1356 cubic feet
Step-by-step explanation:
The volume of cylinder is given by :_
, where r is the radius and l is the length of the cylinder.
Given : A cylindrical diesel fuel holding tank has a radius of r= 6 feet and a length of l=12 feet.
Therefore,
Hence, the volume of cylindrical diesel fuel holding tank =1356 cubic feet
Therefore, the maximum volume of fuel the tank can hold 1356 cubic feet.