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3 years ago

For the functions f(x)=−7x2−x and g(x)=9x2−4x, find (f−g)(x) and (f−g)(1).

Mathematics

1 answer:

siniylev [52]3 years ago

6 0

Step-by-step explanation:

f(x) = -7x² - x

g(x) = 9x² - 4x

(f - g)(x) = (-7x² - x) - (9x² - 4x)

(f - g)(x) = (-7x² - 9x²) + (-x + 4x)

(f - g)(x) = -16x² + 3x

(f - g)(1) = -16(1)² + 3(1)

(f - g)(1) = -16.1 + 3

(f - g)(1) = -16 + 3

(f - g)(1) = -13

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25 points. Need help

mash [69]

Answer:

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Step-by-step explanation:

By applying mean ratio theorem in the given triangle ABC,

$\frac{AD}{BD}=\frac{BD}{CD}$

AD × CD = BD²

21 × 21 = BD²

BD² = (21)²

BD = 21

Therefore, measure of segment BD is 21 units.

7 0

3 years ago

The graph shows the exponential regression model for data representing a rabbit population after x years. Which is true of the r

tamaranim1 [39]

Answer: The graph of the regression model can be used to predict the population size for any number of years in the future.

Step-by-step explanation:

Since with help of the given graph, we can say that

The graph of the regression model is applied for the every real value of x.

Thus the statement The graph of the regression model is limited to whole-number values for x is false.

Also, the range of an exponential function is always a set of real number.

Therefore, The graph of the regression model is limited to whole-number values for y is false.

Since, for 1 year, the approximate population is given,

Therefore, The graph of the regression model cannot be used to approximate the population size for year 1 is false.

Again according to the given graph we can say that we can get the population for any number of year.

Thus, The graph of the regression model can be used to predict the population size for any number of years in the future is true.

5 0

3 years ago

Read 2 more answers

If you eat four medium strawberries you get 48% of your daily recommended amount of vitamin C.what fraction of your daily amount

Ugo [173]

Answer:

52% or 13/25 as a fraction

Step-by-step explanation:

If you get 48%, you will need 52% more to reach 100%. 52/100 can be simplified to 13/25

8 0

3 years ago

Perform the indicated operation. 15 - 12 3 -3 -27 27

Debora [2.8K]

Answer:

Step-by-step explanation:

15-12

This is 12 taken away from 15

00000000 _ 000000

0000000 000000 000

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3 years ago

Please help asap, will mark brainliest :) :)

KatRina [158]

The answer is a so have a good day

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3 years ago