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3 years ago

8 plates cost 48 dollars . how much do 20 plates cost ?

Mathematics

2 answers:

ddd [48]3 years ago

8 0

Answer:

120 dollars

Step-by-step explanation:

each plate cost 6 dollars

48/8= 6

20*6=120

Allisa [31]3 years ago

8 0

Answer:

120 dollars

Step-by-step explanation:

We can write a ratio to solve

8 plates 20 plates

--------------- = ---------------

48 dollars x dollars

Using cross products

8x = 20* 48

8x =960

Divide each side by 8

8x/8 = 960/8

x =120

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Step-by-step explanation:

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A superhero is trying to leap over a tall building. The function f(x)=-16x^2+200x gives the superhero's height in feet as a func

Gemiola [76]

Answer:

Since $\bigtriangleup \geq 0$ , the superhero makes it over the building.

Step-by-step explanation:

The height is given by the following function:

$f(x) = -16x^{2} + 200x$

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We have to find if there is values of x for which f(x) = 612.

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

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If $\bigtriangleup < 0$ , the polynomial has no solutions.

In this question:

$f(x) = -16x^{2} + 200x$

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$16x^{2} - 200x + 612 = 0$

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