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Sindrei [870]
3 years ago
9

Find the sum of 2x 2 + 3x - 4, 8 - 3x, and -5x 2 + 2.

Mathematics
1 answer:
RSB [31]3 years ago
6 0
The sum is -7x2-6x-2
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33 1/3% of what number is 21? (Show work)
grandymaker [24]
33 and 1/3 % is equivalent to 1/3 

(1/3) of what number is 21 

in math-ese: 

(1/3) * x = 21 

multiplying both sides by 3... 

x = 63 

4 0
3 years ago
Click on the length of the rectangle<br><br>​
umka2103 [35]

Answer:

It's 2 1/4

Step-by-step explanation:

I dont know how to explain this... but I'm 100% positive on the answer so

7 0
3 years ago
Explain the difference between a well defined set and a set that is not well defined. Give examples.
yuradex [85]

Answer:

Step-by-step explanation:

A well defined set is one which is universally defined and accepted, you can easily define what the set is and what is not a member of the set.example is a set of integers between 1 and  30

A not well defined set is one which is ill defined set. example is a list of hit musical hit of 2019

6 0
3 years ago
One month Tammy rented 2 movies and 6 video games for a total of $ 42 . The next month she rented 5 movies and 3 video games for
EastWind [94]

Answer:

The rental cost of one movie is $2.25 and the rental cost of one video game is $6.25

Step-by-step explanation:

Let the rental cost of 1 movie be m.

Let the rental cost of 1 video game be v.

One month, Tammy rented 2 movies and 6 video games for a total of $42. This means that:

2m + 6v = 42 ________ (1)

The next month she rented 5 movies and 3 video games for a total of $30. This means that:

5m + 3v = 30 _________(2)

We now have two simultaneous equations:

2m + 6v = 42 ________ (1)

5m + 3v = 30 _________(2)

Multiply (2) by 2, and we have:

2m + 6v = 42 __________ (1)

10m + 6v = 60 _________ (3)

Subtract (1) from (3):

 10m + 6v = 60

-<u> 2m + 6v = 42</u>

 <u>  8m     =     18</u>

=> m = 18 / 8

m = $2.25

Put the value of m back in (1):

2(2.25) + 6v = 42

4.5 + 6v = 42

=> 6v = 42 - 4.5 = 37.5

v = 37.5 / 6

v = $6.25

Therefore, the rental cost of one movie is $2.25 and the rental cost of one video game is $6.25

5 0
3 years ago
What's two thirds of a straight line?
Komok [63]
Well if the straight line is equal to 1 then your answer is 2/3 but if the straight line is not equal to 1 you need to know what it is equal to or you could use the equation y = (2/3)x
"x" would be the length of the straight line and "y" would be two-thirds of it
6 0
3 years ago
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