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8_murik_8 [283]
3 years ago
15

What is (2n-9) -5 (-2.4n+4)

Mathematics
2 answers:
gtnhenbr [62]3 years ago
8 0
2n-9-5-8n+4n
= 2n-14-4n
=2n-14
AnnZ [28]3 years ago
3 0

Answer:

-2n+14

Step-by-step explanation:

2n - 9 - 5 - 8n + 4n  = 2n - 14 - 4n

                                = -2n - 14

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What is the average rate of change of the function f(x)=5(2)^x from x = 1 to x = 5?
Mila [183]
Average rate of change refers to the slope of a function/equation. 
To solve this, plug in for both x values and calculate the average, or mean. 

x = 1 
f(1) = 5(2)^1 
      = 5(2) 
      = 10

x = 5 
f(5) = 5(2)^5
      = 5(32) 
      = 160

Now, you calculate the average: 
10 + 160 = 170 
Divide by 2 and you get 85.



5 0
3 years ago
Find the third side in simplest radical form <br> can anybody help me with this please!
Katyanochek1 [597]

Answer:

sqrt(98) aka \sqrt{98}

Step-by-step explanation:

To find the third side we need to use the Pythagorean theorem (a^2 + b^2 = c^2)  so let 3 = a and b = sqrt(89) so a^2 = 9 and for b^2 just ignore the square root so b^2 = 89 then we add 9 and 89 89 + 9 = 98 so c^2 = 98 then we do the square root of 98 since the square root of 98 isn't a whole number/ has a decimal we just leave it written as sqrt(98)

8 0
3 years ago
Evaluate the expression. 42+5⋅32−42÷23 CLEAR CHECK 12.625 222 45 59
lidiya [134]

Answer:

\frac{4604}{23} or  200.173913

Step-by-step explanation:

42+(5)(32)-\frac{42}{23} \\\\=42+160-\\\frac{42}{23}\\\=202-\frac{42}{23} =\frac{4604}{23}

5 0
3 years ago
Polynomial in standard form.
nataly862011 [7]

Answer:

-2x² - 8x - 15

Step-by-step explanation:

-(2x² + 4x + 11) + (-4)

-2x² - 8x - 11 - 4

-2x² - 8x - 15

6 0
3 years ago
I NEED HELP WITH PRECALC PLEASE
alisha [4.7K]

Answer: First question: D, Second question: A

Step-by-step explanation:

Note: I'm not so good at expanding so I'll just solve it :)

So this leaves either C or D

Apply the sum rule:

8-70=-62

The only one that gives a negative sum is D

For the second picture, the one you have chosen is correct

a1 = 3 and r = -5 so:

an = 3/5 * (-5)^n

Plugging in 8 for n (the first choice) we get the given term: -234,375

8 0
2 years ago
Read 2 more answers
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