Solve the quadratic equation 3x - 5x - 7 = 0
Give your answers to 3 significant figures.

The solutions of are and .

Step-by-step explanation:

The statement is incomplete. The complete description will be shown below:

Solve the quadratic equation . Give your answers to 3 significant figures.

From Algebra we know that second order polynomials of the form , can be solved anatically by means of the Quadratic Formula, that is:

(1)

Where , , are coefficients of the given polynomial.

If we know that , and , then the roots of the polynomial are:

That is,

and

The solutions of are and .

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

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step-by-step explanation:

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