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scoundrel [369]
3 years ago
13

Can someone please help me with question 3 and 4

Mathematics
1 answer:
storchak [24]3 years ago
7 0
3. it would be 15 because it is multiplying by 3

4. it would be 11 because it's subtracting 2
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Please help me it’s due today and idk math .
Ulleksa [173]

Answer:

you need to ask one bye one. easyer for us

8 0
3 years ago
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Solve by Substitution<br> Show Steps<br> −2x + 3y + 5z = −21<br> −4z = 20<br> 6x − 3y = 0
Anarel [89]

−2x + 3y + 5z = −21

−4z = 20

6x − 3y = 0

do -4z=20 first

divide both sides by -4 to get z by itself

-4z/-4=20/-4

z=-5

Use z=-5 into −2x + 3y + 5z = −21

-2x+3y+5(-5)=-21

-2x+3y-25=-21

move -25 to the other side

sign changes from -25 to +25

-2x+3y-25+25=-21+25

-2x+3y=4

6x-3y=0

find x by eliminating y

Add the equations together

-2x+6x+3y+(-3y)=4+0

-2x+6x+3y-3y=4

4x=4

Divide by 4 for both sides

4x/4=4/4

x=1

Use x=1 into 6x − 3y = 0

6(1)-3y=0

6-3y=0

Move 6 to the other side

6-6-3y=0-6

-3y=-6

Divide both sides by -3

-3y/-3=-6/-3

y=2

Answer:

(1, 2, -5)

5 0
3 years ago
Read 2 more answers
Help me YALL lol!!!!!!!!!!!!!!!
slavikrds [6]

Answer:

15=2x

There are fifteen 1 blocks and two x blocks, which makes 15=2x(or 2x=15)

3 0
3 years ago
Help needed ASAP
pogonyaev

Answer:

D) (8,-22)

Step-by-step explanation:

I used my graphing calculator.

6 0
2 years ago
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Factor completely.<br> 81a^2+180x+100=
trasher [3.6K]

Answer:

You cannot factor this

Hope this helped!

8 0
2 years ago
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