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Bad White [126]
3 years ago
13

Simplify the expression: 3(2x2 + 7x + 4) - 8x2 + 15

Mathematics
1 answer:
Softa [21]3 years ago
5 0

Answer:

-2x² + 21x + 27

Step-by-step explanation:

distribute 3 to get:

(6x² + 21x + 12) - 8x² + 15

combine 'like terms' to get:

-2x² + 21x + 27

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Marina86 [1]

Answer:

-3,-2,-1,0,1,2,3,4,5

8 0
3 years ago
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Charles has $1600 dollars in his account and makes automatic $400
kipiarov [429]
1600(-400)= f is the y axis and -400 because its taking money from his account
3 0
3 years ago
The average age of online consumers a few years ago was 24.1 years. As older individuals gain confidence with the​ Internet, it
love history [14]

Answer:

The correct option is (C).

Step-by-step explanation:

A null hypothesis is a sort of hypothesis used in statistics that intends that no statistical significance exists in a set of given observations.  

It is a hypothesis of no difference.

It is typically the hypothesis a scientist or experimenter will attempt to refute or discard. It is denoted by H₀.

Whereas the alternative hypothesis is a contradicting statement tot he null hypothesis. It is denoted by Hₐ.

In this case we need to test whether the average age of online consumers has increased or not.

From previous data we know that the average age of online consumers a few years ago was 24.1 years.

A one-sample mean test can be used to determine whether the mean age has increased or not.

The hypothesis for the test can be defined as follows:

<em>H₀</em>: The average age of online consumers is 24.1 years, i.e. <em>μ</em> = 24.1.

<em>Hₐ</em>: The average age of online consumers is more than 24.1 years, i.e. <em>μ</em> > 24.1.

Thus, the correct option is (C).

6 0
3 years ago
Find the length of the third side. If necessary, round to the nearest tenth.<br> 14<br> 21
Shkiper50 [21]
The answer in decimal format is 15.7
Or 7 radical 5
4 0
3 years ago
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What is the measurement of ABC?<br> D. 1180<br> A. 28°<br> ОО<br> E. 208°<br> B. 62°<br> O c. 90°
Len [333]

Answer:

118°

Step-by-step explanation:

Line b is a perpendicular bisector so 90°+28°=118°

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3 years ago
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