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Fudgin [204]
4 years ago
6

PLEASE HELP!!

Mathematics
1 answer:
Mariulka [41]4 years ago
6 0
2. 3. 5. are correct

1. and 4. are actually interchanged
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X2-3xy-5xy-7y2+4x2+8y2
Zepler [3.9K]

For this case we must simplify the following expression:

x ^ 2-3xy-5xy-7y ^ 2 + 4x ^ 2 + 8y ^ 2

We must add similar terms taking into account that:

  • Equal signs are added and the same sign is placed.
  • Different signs are subtracted and the major sign is placed.

(x ^ 2 + 4x ^ 2) + (- 3xy-5xy) + (- 7y ^ 2 + 8y ^ 2) =\\5x ^ 2-8xy + y ^ 2

Thus, the simplified expression is:

5x ^ 2-8xy + y ^ 2

Answer:

5x ^ 2-8xy + y ^ 2

4 0
4 years ago
Drag steps of the solution into order to solve for x in the equation 6(x-5) = 54
telo118 [61]

The steps of the solution into order to solve for x in the equation 6(x-5) = 54 are:

  • A. 6x – 30 = 54
  • B. 6x = 84  
  • D. x = 14

Given the expression 6(x-5) = 54

Expand the expression in parenthesis using the distributive law;

6x - 6(5) = 54

6x - 30 = 54

Add 30 to both sides

6x - 30 + 30 = 54 + 30

6x = 84

Divide both sides by 6

6x/6 = 84/6

x = 14

Therefore the steps of the solution into order to solve for x in the equation 6(x-5) = 54 are:

  • A. 6x – 30 = 54
  • B. 6x = 84  
  • D. x = 14

Learn more on equations here; brainly.com/question/2972832

7 0
2 years ago
A right cone has a slant height of 20 feet, and the diameter of the base is 24
ipn [44]

Answer:

D. 16 ft

Step-by-step explanation:

h = √20² - (24/2)² = √400-144 = √256 = 16

7 0
3 years ago
HELPP!!!! Is the first one right? and if not can u correct it also can u help me on the other ones plz!!!!???
SpyIntel [72]

Answer:

69 noice

Step-by-step explanation:

8 0
3 years ago
3-2/3= ?<br><br><br> 2/3 is half
Helga [31]
Exact form = 7/3

Decimal = 2.3

Mixed number Form = 2 1/3
8 0
3 years ago
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