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navik [9.2K]
3 years ago
9

5+7+9=7+5+8 what property

Mathematics
2 answers:
gogolik [260]3 years ago
7 0
Associative property
inysia [295]3 years ago
5 0
Well, i think by 8 you mean 9. This is the commutative property of which you switch the numbers around but you get the same answers 
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Solve the system of equations using elimination: -8x-4y=4 and -5x-y=-11.
ziro4ka [17]

The solutions to the given system of equations are x = 4 and y = -9

<h3>Simultaneous linear equations</h3>

From the question, we are to determine the solutions to the given system of equations

The given system of equations are

-8x-4y=4  --------- (1)

-5x-y=-11   --------- (2)

Multiply equation (2) by 4

4 ×[-5x-y=-11 ]

-20x -4y = -44  -------- (3)

Now, subtract equation (3) from equation (1)

-8x -4y = 4  --------- (1)

-(-20x -4y = -44)  -------- (3)

12x = 48

x = 48/12

x = 4

Substitute the value of x into equation (2)

-5x -y = -11

-5(4) -y = -11

-20 -y = -11

-y = -11 + 20

-y = 9

∴ y = -9

Hence, the solutions to the given system of equations are x = 4 and y = -9

Learn more on Simultaneous linear equations here: brainly.com/question/26310043

#SPJ1

6 0
1 year ago
Please help quickly!!!!!!!!!!The area of the regular pentagon is 6.9 cm2. What is the perimeter? 2 cm 5 cm 10 cm 20 cm
pishuonlain [190]
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random words to fill up 20 character minimum for answering questions :P
7 0
3 years ago
Read 2 more answers
Someone help please i don’t want to fail math
VladimirAG [237]

Answer:

Image below!

Step-by-step explanation:

<u>Plotting </u>\underline{y=2x+3}<u />

Step 1: determine the y-intercept

(0,3)

  • plot the point as the first point on the graph

Step 2: Move 2 units up, and 1 unit left (keep repeating this process until you have reached the limit of the graph)

Step 3: Go to the other side of the graph of the first point (y-intercept)

  • move 2 units down, and 1 unit right keep repeating this process until you have reached the limit of the graph)

<em>When you've completed this process, it should look like this:</em>

5 0
2 years ago
Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 3. (Input decimals only, such as 12.71, as the answer.
kondaur [170]

Answer:

87.92

Step-by-step explanation:

3.14(a²+ab)=

<em>Plugging in values for a and b</em>

3.14(4²+4×3)=

3.14(16+12)=

3.14(28)=

87.92

6 0
3 years ago
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I think i found the right one but I let her go thru my things but she wont lemme go thru her stuff what does that mean :( I want
Naily [24]

Answer:

she is ether hiding something. or she just wants you to respect her privacy and she is trying to see how much you trust her so she can figure out how much she can trust you. i say you should just tell her you don't care what she does to just do what she would want and then let her actions decide whether she realy cares abought or respects yall's relationship. maby put it in kinder words than  did tho or you might just pi22 her off

Step-by-step explanation:

the 22 is ss i just dont want to get banned

8 0
3 years ago
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