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3 years ago

How do the real solution of a quadratic equation show on a graph of that equation?

Mathematics

1 answer:

NeX [460]3 years ago

5 0

Answer:

They show as intersections with the x-axis

Step-by-step explanation:

For example, the quadratic y = x² - 1 has roots x = -1 and x = 1.

They show on the graph as intersections of the parabola with the x axis at x = -1 and x = 1.

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FrozenT [24]

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Step-by-step explanation:

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3 years ago

The ratio of Victors money to Susies money is 4:7 at first. After Victor spent half of his money and Susie spent $60, Susie had

valkas [14]

Answer:

Victor originally had $80

Step-by-step explanation:

Let Victor have $4x

Let Susie have $7x

Since Victor spent half his money, he now has $2x

Susie spent $60 and thus now has $(7x - 60)

The final ratio of Victor's money to Susie's money is therefore 2x : $(7x - 60). This is given 1:2. Now we just need to solve the proportion by cross-multiplying

2x : (7x - 60) = 1:2

1 × (7x - 60) = 2 × 2x

7x - 60 = 4x

3x = 60

x = 20

Therefore Victor originally had $4x = $80.

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2 years ago

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There are four $20 bills, five $10 bills, seven $5 bills, and four $1 bills in your wallet. You select one bill at random. What

coldgirl [10]

The expected value is to get either a $5 bill or a $10 bill because of it has more of it's kind in the wallet.

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3 years ago

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stepladder [879]

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Step-by-step explanation:

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Find the total surface area of the cylinder shown. Leave the answer in terms of π. A cylinder with radius 4.25 inches and height

olga_2 [115]

Answer:

$87.125\pi in^{2} or 87\frac{1}{8}\pi in^{2}$

Step-by-step explanation:

Given Surface Area of Cylinder = $2\pi rh+2\pi r^{2}$ ,

and also given r = 4.25 inches and h = 6 inches.

Let's Substitute r and h into the formula to find the total surface area.

Surface Area of Cylinder = $2\pi (4.25)(6)+2\pi (4.25)^{2} \\=51\pi +36.125\pi \\=87.125\pi in^{2} or 87\frac{1}{8} \pi in^{2}$

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2 years ago

How do the real solution of a quadratic equation show on a graph of that equation?​

How do the real solution of a quadratic equation show on a graph of that equation?