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3 years ago

Evaluate this function f(x)= -x2+6x+19 Find f(5)

Mathematics

1 answer:

mario62 [17]3 years ago

7 0

Answer:

f(5) = -10+30+19 = 39

Step-by-step explanation:

f(5) = (-5)2+6(5)+19

-10+30+19

=39

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If three quarters of a number decreased by twenty is equal to eighty two, what is that number?

Studentka2010 [4]

A number is :

$x$

_________________________________

Three quarters of it means :

$\frac{3}{4}x \\$

_________________________________

Decrease by 20 means :

$\frac{3}{4}x - 20 \\$

_________________________________

Equals to 82 means :

$\frac{3}{4}x - 20 = 82 \\$

_________________________________

What is that number ?

x asked so we must solve the above equation for x.

Let's do it....

$\frac{3}{4}x - 20 = 82 \\$

Plus sides 20

$\frac{3}{4}x = 82 + 20 \\$

$\frac{3}{4}x = 102 \\$

Multiply sides by 4

$3x = 102 \times 4$

Divided sides by 3

$x = \frac{102 \times 4}{3} \\$

$x = \frac{102}{3} \times 4 \\$

Simplify

$x = 34 \times 4$

$x = 136$

So that number is 136 .

_________________________________

And we're done.

Thanks for watching buddy good luck.

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5 0

3 years ago

Is 4.15 greater than 4.051

I am Lyosha [343]

Yes (my answer need to be greater than 20 characters long so...Ahhhhh). A way to help you is see it as 4.1 and 4.0 because the # after the 1 aren't that important

6 0

3 years ago

I need help getting the answer could you help me by chance to receive brainlest!?

Pani-rosa [81]

(Placeholder because it won’t let me ask more questions until I answer some)

5 0

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(32)4 = <br> A) 36 <br> B) 38 <br> C) 96 <br> D) 98

Yuki888 [10]

Sir or ma’am I don’t think these are the right possible answer choices.

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3 years ago

Please explain so I can understand

Tju [1.3M]

Answer:

well im pretty sure its ( 1,1,3)

Step-by-step explanation:

21-1-2

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3 years ago