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Anni [7]
2 years ago
6

If a+b=2 find the value of a3+b3+6ab

Mathematics
1 answer:
mars1129 [50]2 years ago
7 0

Answer:

Step-by-step explanation:

Factor the sum of cubes

a³ + b³ = (a+b)(a² - ab +b²)

= 2a² - 2ab + 2b²

a³ + b³ + 6ab = 2a² + 4ab + 2b²

= 2(a² + 2ab +b²)

= 2(a+b)²

= 8

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Please help! 9/4(7+3-4*9)
Serga [27]

Answer:

58.5

Step-by-step explanation:

This expression should be simplified using order of operations. According to order of operations or PEMDAS, complete any numbers in parenthesis then any exponents, multiplication, division, additions and subtraction moving left to right through each operation.

Begin with Parenthesis.

(7+3-4*9) - Multiply first

(7+3-36) - Then add/subtract left to right

10 - 36 = -26

Replace -26 where the parenthesis were in the original expression.

9/4 (-26)

234/4

58.5

6 0
3 years ago
A fabric store sells close-out fabrics for $2.14 a yard. A customer buys 8 yards of fabric. How much does the customer pay for t
blsea [12.9K]

Answer:

$17.12

Step-by-step explanation:

2.14 · 8 = 17.12

8 0
2 years ago
Write 39% as a fraction.
shutvik [7]
39/100 this is the answer of 39% as a fraction h
8 0
3 years ago
The ratio of boys to girls at a movie is 4:7. If there are 21​ girls, how many boys are at the​ movie?
GaryK [48]

Answer:

12 boys

Step-by-step explanation:

7 x 3 = 21

4 x 3 = 12

12 boys

3 0
2 years ago
Answer this please, thanks
beks73 [17]

Answer:

300ft^3

Step-by-step explanation:

I'm guessing what the question meant be triangular is a triangular prism.

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L=10

W=10

H=6

(6)(10)(10)=600

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Hope this helps! :)

8 0
2 years ago
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