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3 years ago

Can some one help with this one question

Mathematics

2 answers:

jolli1 [7]3 years ago

5 0

the answer is D. day 4

Oliga [24]3 years ago

4 0

D. day 4
There is a spike in the graph indicating this.

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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:

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

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.

7 0

3 years ago

25,00 people took part in a cross-country race The number of adults was 4 times the number of children there were 1,200 men.How

erastovalidia [21]

Answer:

Step-by-step explanation:

number of people= 2500

number of children =x

number of adults = 4x

so, 4x+x= 2500

x= 2500/5=500 children

number of men = 1200

number of women = 2500-(1200+500)= 800

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3 years ago

Convert 65 mm to meters

Ymorist [56]

0.065 meters is equal to 65 millimeters

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A straight line that is parallel to one of the sides of a given triangle intersects its other two sides (or their extensions) an

timurjin [86]

Answer:

We know that this triangle is similar because it will have all of the same angles as the first triangle. This is because two parallel lines cut by a transversal will create the same angles. In addition, they share the final angle because we are not changing that angle. Therefore, all 3 are the same, which makes them similar triangles.

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3 years ago

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Bradley completed 3/5 of his homework. What percent of his homework does he still need to complete?

muminat

3/5 = 6/10 (which is 60%) 100% - 60% = 40%

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