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3 years ago

I need help in this one please

Mathematics

2 answers:

Katyanochek1 [597]3 years ago

8 0

The answer is -3. I had a lovely explanation to go with this, but unfortunately the filter will not allow me to post it and I'm not sure why. Sorry for the inconvenience.

chubhunter [2.5K]3 years ago

4 0

For this case we have the following functions:
$f (x) = x-2

g (x) = x ^ 2 - 7x - 9$
The first thing we must do is perform the composition of functions.
We have then:
$f (g (x)) = (x ^ 2 - 7x - 9) -2
$
Rewriting we have:
$f (g (x)) = x ^ 2 - 7x - 11
$
We now evaluate the function for x = -1.
We have then:
$f (g (-1)) = (-1) ^ 2 - 7 (-1) - 11
$
Rewriting we have:
$f (g (-1)) = 1 + 7 - 11

f (g (-1)) = -3$
Answer:
The function of f composed with g evaluated for x = -1 is given by:
$f (g (-1)) = -3
$
option 2

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In a recent year, companies spent a total of $88.8 billion on newspaper, television, and radio ads. The total amount spent on

g100num [7]

Answer:

The amount spent on radio is $8.5 billion

The amount spent on television is $37.5 billion

The amount spent on newspaper is $42.8 billion

Step-by-step explanation:

Let;

x represent the amount spent on radio ads

y represent the amount spent on television ads

z represent the amount spent on newspaper ads.

The total amount spent on ads

x + y + z = 88.8 ......1

The total amount spent on television and radio ads was only $3.2 billion more than the amount spent on newspaper ads alone.

x + y = 3.2 + z

x + y - z = 3.2 .....2

The amount spent on newspaper ads was $5.3 billion more than what was spent on television ads.

z = 5.3 + y

z - y = 5.3 ......3

Subtracting equation 2 from equation 1;

(x + y + z) - (x + y - z) = 88.8 -3.2

z + z = 85.6

2z = 85.6

z = 85.6/2

z = 42.8

We can now substitute the value of z into equation 3

42.8 - y = 5.3

y = 42.8 - 5.3

y = 37.5

Substituting y and z to equation 1, we have;

x + 37.5 + 42.8 = 88.8

x =88.8 - (37.5 + 42.8)

x = 8.5

Therefore;

The amount spent on radio is $8.5 billion

The amount spent on television is $37.5 billion

The amount spent on newspaper is $42.8 billion

7 0

3 years ago

Explain how you could mentally find 8×45 by using the distributive property

nirvana33 [79]

8 x 45 = 8(20 + 25) = (8 x 20) + (8 x 25) = 160 + 200 = 360

3 0

4 years ago

Simplify quantity 4 x squared plus 12 x minus 16 all over quantity 2x plus 10 over quantity 6 x plus 24 over quantity x squared

Softa [21]

The answer is: (x-1)(x+4)/3
hope this helped! (:

6 0

4 years ago

Read 2 more answers

The sales at a particular bookstore grew from $2006 million in 2000 to $3803 million in 2005. Find an exponential function to mo

Mariana [72]

Yes initial amount is 2044 (in millions)

Since the function is from 2000 then you can set it up as
B(t)=2044*a^t

To solve for "a" use the second number given, 3846, and since this value is 5 years after 2000 t=5
so we plug in these values
3846=2044*a^5

we now solve for a

first, divide by 2044
3846/2044=a^5

next, we take the 5th root
<span>5sqrt(3846/2044) = a

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
</span>

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3 years ago

Identify the expression equivalent to 2x + 8 by substituting x = 7 and<br> x = 5

Anastasy [175]

2(7)+8 2(5)+8

14+8= 10+8=
22 18

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3 years ago