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2 years ago

F(x) = -2x^2 - 10x what is f(-5)

Mathematics

2 answers:

Tanzania [10]2 years ago

5 0

Answer:

your answer would be 0

Step-by-step explanation:

Vaselesa [24]2 years ago

5 0

0 probabyyyyyyyyyyyyy

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Se lanza un objeto desde una plataforma.

jasenka [17]

Answer:

6 seconds

Step-by-step explanation:

The question in English is

An object is thrown from a platform.

Its height (in meters), x seconds after launch, is modeled by:

h(x)=-5x^2+20x+60

How many seconds after the launch does the object reach the ground?

Let

x ----> the time in seconds

h(x) ---> the height of the object

we have

$h(x)=-5x^2+20x+60$

we know that

When the object hit the ground the height is equal to zero

For h(x)=0

we have

$-5x^2+20x+60=60$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$-5x^2+20x+60=60$

$a=-5\\b=20\\c=60$

substitute in the formula

$x=\frac{-20\pm\sqrt{20^{2}-4(-5)(60)}} {2(-5)}$

$x=\frac{-20\pm\sqrt{1,600}} {-10}$

$x=\frac{-20\pm40} {-10}$

$x=\frac{-20+40} {-10}=-2$

$x=\frac{-20-40} {-10}=6$

The solution is x=6 sec

The he object reach the ground at x=6 seconds

7 0

3 years ago

If a function f is increasing on (a,

pashok25 [27]

If the function is continuous on (a,c), it has a maximum at b. if it is not continuous, nothing can be said.

8 0

3 years ago

Graph the line based on the following information. y−intercept: 2 Slope: − 4/1

Lena [83]

You would start at 2 and go down 4 and left 1

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3 years ago

Read 2 more answers

The sum of a number and its reciprocal is 13/6. find the number

iris [78.8K]

Suppose the number is x, its reciprocal is 1/x
x+1/x=13/6
(x^2+1)/x=13/6
6(x^2+1)=13x
6x^2-13x+6=0
(3x-2)(2x-3)=0
x=2/3 or x=3/2

6 0

3 years ago

Change 3/2 to a mixed number

Mariulka [41]

Okay first you have to divide
2 goes into 3
3/2
2 fits into 3 once
1 and the left over is 1 so
1 1/2

4 0

3 years ago