Answer:
One solution
Step-by-step explanation:
(given)
∴ There is only one solution to this equation since 
can only equal to 
to satisfy the equation.
Hope this helps :)
Move all terms to one side
4w^2 + 49 + 28w = 0
Rewrite 4w^2 + 49 + 28w in the form a^2 + 2ab + b^2, where a = 2w and b = 7
(2w)^2 + 2(2w)(7) + 7^2 = 0
Use the Square of Sum: (a + b)^2 = a^2 + 2ab + b^2
(2w + 7)^2 = 0
Take the square root of both sides
3w + 7 = 0
Subtract 7 from both sides
2w = -7
Divide both sides by 2
<u>w = -7/2</u>
Percent change=change/original times 100
change=20-16=4
original=20
change=4/20 times 100=0.2 times 100=20
answer is 20%
G= number of marbles
Blue + Red + Green = All marble
9= 5+3+g so g= 9-5-3 so g=1
Ratio 1:9
Answer: d. s=16-t²
Step-by-step explanation: the answer is s=16-t², because for this case is really important to keep in mind which is the value with the quadratic expression, when we have a quadratic expression the graphic representation will be a parabola, in a parabola you will find a point that never change which is constant in the diagram.
also keep in mind that the values which are placed in the axis of the ordinates are the independent variables and in parabola the quadratic values are placed in the axis of the ordinates , and for this case is t² because of the quadratic expression, then we can find that t² is the independent variable and s is the dependent variable.
