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DerKrebs [107]
3 years ago
13

Please show your work on this and I’ll mark you brainliest!!

Mathematics
1 answer:
larisa [96]3 years ago
4 0
F(x) = 3x^2 + 4x - 1

f(-3) = 3(-3)^2 + 4(-3) - 1

f(-3) = 3 * 9 - 12 - 1

f(-3) = 27 - 12 - 1

f(-3) = 15 - 1

f(-3) = 14
You might be interested in
Nifal earned 9$ for washing two cars .He recived $1 more for the second car.How much was he paid for washing each car?Which two
Sveta_85 [38]

Answer:

Nifal received $ 4 for washing the first car.

Nifal received $ 5 for washing the second car.

4 and 5 have a sum of 9.

Step-by-step explanation:

The problem can be rewritten as follows: Find the sum of two consecutive entire numbers equal to 9. That is:

x + y = 9

y = x+1

Then, by eliminating y:

x + (x+1) = 9

2\cdot x + 1 = 9

Now, let is clear x:

2\cdot x = 8

x = 4

Nifal received $ 4 for washing the first car.

The earning for the second car is: (x = 4)

y = x +1

y = 4 + 1

y = 5

Nifal received $ 5 for washing the second car.

4 and 5 have a sum of 9.

8 0
3 years ago
Help pleaseeeeee nowwwwww
Snezhnost [94]

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)

5 0
3 years ago
Can somebody plz answer this math problem correctly thanks!<br><br> WILL MARK BRAINLIEST :D
Soloha48 [4]

Answer:

Ellen and Blake answered 20 questions correctly since Ellen had 0.8 correct and that is 80% same with Blake

Stephen scored a .84 or an 84%

I hope this helps :)

Step-by-step explanation:

plz mark B R A I N L I E S T

3 0
2 years ago
Read 2 more answers
Which of the following best describes the movement of an object
Ainat [17]
There is no following, however


Motion, best describes the movement of an object.

Hope this helps!
4 0
3 years ago
What conjecture can you make about the sum of the first 29 positive even ​numbers?
hoa [83]
An = A1 + (N-1)d 
A1 is the first term (in this case 2)
d is the common difference (what is the difference between all consecutive even numbers? 2)
N is the number of terms to find (in this case 29)
An = 2 + (29-1)2 = 58
I would say none of the above, unless you typed it wrong.  The sum is the product of the number of terms minus one and two, plus two more.  So it's almost answer B but not really.  Good luck with this one.  
3 0
3 years ago
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