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3 years ago

Inequalities! 20 Points!

Mathematics

2 answers:

Zanzabum3 years ago

7 0

Answer:

he needs at least 5800

5800/725

so he must sell at least 8 cars

There are only 45 cars on the lot, so that is the max he can sell

Choice C

8<=x<=45Step-by-step explanation:

il63 [147K]3 years ago

3 0

he needs at least 5800

5800/725

so he must sell at least 8 cars

There are only 45 cars on the lot, so that is the max he can sell

Choice C

8<=x<=45

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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:

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

Will the superhero make it over the building?

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:

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

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

$\bigtriangleup = b^{2} - 4ac$

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

In this question:

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

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

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

We have to find $\bigtriangleup$

We have that $a = 16, b = -200, c = 612$ . So

$\bigtriangleup = (-200)^{2} - 4*16*612 = 832$

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

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Veseljchak [2.6K]

Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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Answer:

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