1 year ago

Xavier is buying a new pair of snowshoes. They are regularly $85, but they are on sale for $68. What percent is the markdown?

Mathematics

1 answer:

Mandarinka [93]1 year ago

4 0

Answer:

25%

Step-by-step explanation:

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In the derivation of the quadratic formula by completing the square, the equation (x+b over 2a)^2=-4ac+b^2 over 4a^2 is created

vredina [299]

Answer:

The result of applying the square root property of equality to this equation is $x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$ .

Step-by-step explanation:

Consider the provided equation.

$\left(x+\dfrac{b}{2a}\right)^2=\dfrac{-4ac+b^2}{4a^2}$

As the above equation is formed by perfect square trinomial so simply applying the square root property as shown:

$\sqrt{(x+\dfrac{b}{2a})^2}=\pm \dfrac{\sqrt{-4ac+b^2}}{\sqrt{4a^2}}\\x+\dfrac{b}{2a}=\pm \dfrac{\sqrt{b^2-4ac}}{2a}$

Isolate the variable x.

$x=-\dfrac{b}{2a}\pm \dfrac{\sqrt{b^2-4ac}}{2a}\\x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Hence, the result of applying the square root property of equality to this equation is $x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$ .

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2 years ago

Read 2 more answers

Riley started selling bracelets. During the first month she sold 400 bracelets at $10 each. She tried raising the price, but for

love history [14]

I would just divide 400 and 10 and then try to come up with the salary

8 0

2 years ago

The oblique rectangular prism below has a length of 6 cm, a width of 8 cm, and a height of 7 cm.What is the area of the base of

Rudiy27

Answer:

Area of the base of the prism = 48cm²

Step-by-step explanation:

A rectangular prism has a rectangular base

Area of a rectangular base, A = length x width

A = 6cm x 8cm = 48cm²

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2 years ago

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Sam is 3 years younger than Susan. Susan is 40 years old. If Sam is s years old, the equation that relates his age with Susan's

dedylja [7]

Answer:

Sam is 37 years old.

Step-by-step explanation:

Susan is 40. Sam is just 3 years younger, making him/her 37.

40 = S + 3

(S = 37)

I hope this helped at all ^-^ Please tll me if I made an error or left something out.

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2 years ago

In 2012, California had a population of about 38 million people, and North Dakota had a population of about 699,000 people. What

Gemiola [76]

Answer:

37,301,000

Step-by-step explanation:

The difference in population can be determined by subtracting the population of North Dakota from California

38,000,000 - 699,000 = 37,301,000

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2 years ago