Answer: x = - 3.5
Step-by-step explanation:
Rewrite the equation by completing the square.
4x2 + 28x + 49 = 0
Completing the square method :
Divide through by the Coefficient of x^2
x^2 + 7x + (49/4) = 0
a = 1, b = 7, c = 49/4
Move c to the right side of the equation
x^2 + 7x = - 49/4
Complete the square on the left hand side by squaring its half of the x term
(7/2)^2 = (49/4)
Add the output to both sides of the equation
x^2 + 7x + (49/4) = - (49/4) + (49/4)
(x + 7/2)^2 = 0
Square root of both sides
x + 7/2 = 0
x = - 7/2
x = - 3.5
Hello :
<span>equation best represents the line is : y = 4x</span>
Answer:
there is a 1 to 15 relationship between miles and gallons
Step-by-step explanation:
Answer
27x^22-3x-1
hope this is right!!
Step-by-step explanation:
42
Step-by-step explanation:
<em>I added 11+12+10+9=42</em>
