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andreev551 [17]
2 years ago
5

Plzz help!!!!!!!I 'll give brain liest​

Mathematics
1 answer:
Basile [38]2 years ago
7 0

Answer:

Step-by-step explanation:

1. 3x2 + 5x - 4 + 6x2 - x + 7

= combining like terms

= 9x2 + 4x + 3

2. 2y2 - 3y + 6 + y2 - 5y - 1 + (-4) + 2y2 - 2y

= 5y2 - 10y + 1

3. 2x2y - 3xy2 + x2y - 4x2y - 2xy2

= - x2y - 5xy2

4. x2 - y2 + 2x2 - 3xy + 4y2 + 3y2 - 5xy - x2

= 2x2 - 8xy + 6y2

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The sum of the measures of the interior angles of a polygon is 1140. What kind of polygon is it ?
sukhopar [10]

Answer:

5) Regular decagon. 6) Yes.

Step-by-step explanation:

Number 6 is yes bc the interior angles of a triangle have to equal 180, and 1+2+177 equals 180.

5 0
2 years ago
4, 8, 12, 16, 20 24, 36, 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100... Those are the multiples of 4. Now find out which ar
Lilit [14]

Answer:

Ok the answer of 6 are  12, 18, 24, 30, 36, 42, and 48. The multiples of 9 are 18,27,36,45,54,63,72,81,90,99,108,117,126,135,144,153,162,171,180,189,198,. Hope it helps!

7 0
3 years ago
What is 2 -2<br> in 6th grade
Bezzdna [24]

Howdy! My name is Christian and I’ll try and help you with this question!

Date: 9/28/20 Time:  8:38 pm CST

Answer:

0

Explanation:

2 -2 = 0 :D

Hope this helps you with your question!

<em>Sincerely, </em>

<em> </em>

<em> </em>

<em>Christian </em>

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3 0
3 years ago
Please answer properly.
madreJ [45]

Answer:

1) y=-6

2)x=3

3) y=8

4)a=8

Step-by-step explanation:

4y+24=0

subtract 24 from both sides

4y=-24

divide both sides by 4

y=-6

---------->>>>

15+3=6x

combine like terms

18=6x

divide both sides by 6

3=x

---------->>>>

9y-72=0

add 72 to both sides

9y+72

divide both sides by 9

y=8

---------->>>>

8a=75-11

combine like terms

8a=64

divide both sides by 8

a=8

--------------------------------------------

Hope this is helpful.

8 0
3 years ago
Read 2 more answers
Please I need help please and thank u
kogti [31]

Answer:

8x7

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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