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IceJOKER [234]
2 years ago
9

This question drive me craz! Help me to solve the question

Mathematics
1 answer:
Darina [25.2K]2 years ago
7 0

4680 - 520 = 4160

4160/2 = 2080$ this is the answer

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Simplify (a+b)^3 + (a-b)^3 + 6a(a^2-b^2)
11111nata11111 [884]

Answer:

8a^3.

Step-by-step explanation:

(a+b)^3=a^3+b^3+3a^2b+3ab^2

(a-b)^3=a^3-b^3-3a^2b+3ab^2

(a+b)^3+(a-b)^3=2a^3+6ab^2

According to the question

(a+b)^3+(a-b)^3+6a(a^2-b^2)

Put in the value

=2a^3+6ab^2 +6a^3–6ab^2

=8a^3

7 0
3 years ago
construction workers resurface parts of the N1 Highway.They complete 2km per day.How many kilometres are completed in total afte
Alex73 [517]

6 kilometers I think

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3 years ago
Erica is given the diagram below and asked to prove that AB DF. What would be the missing step of the proof?
Elanso [62]
Correct answer is B. Check attached image file.

8 0
2 years ago
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A bag contains 10 marbles: 3 are green, 5 are red, and 2 are blue. Karen chooses a marble at random, and without putting it back
gregori [183]

Answer:

don't bother commenting im a bot

Step-by-step explanation:

8 0
3 years ago
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Help with this word problem!
rewona [7]

Answer

x = 15

y = 30

So...<u>15 adults and 30 children attended the school play.</u>

Step-by-step explanation

Part 1: Set up system of equations

We know that the sum of the number of children and the number of adults is equal to 45, so the first equation is...

{x + y = 45

(x = number of adults and y = number of children)

The second equation has to be focused more on the cost per person and the total profit...

{5x + 3y = 165

System of equations:

{x + y = 45

{5x + 3y = 165

Part 2: Solve for y

Get x by itself in the first equation and then substitute the right side of the resulting equation in for x in the second equation. Then solve for y.

x + y = 45

x + y - y = 45 - y

x = 45 - y


5x + 3y = 165

5(45 - y) + 3y = 165

225 - 5y + 3y = 165

225 - 2y = 165

-2y + 225 - 225 = 165 - 225

-2y = -60

-2y / -2 = -60 / -2

y = 30

Part 3: Solve for x

Substitute the value of y into the first equation and solve for x.

x + y = 45

x + 30 = 45

x + 30 - 30 = 45 - 30

x = 45 - 30

x = 15

I hope this helps!

6 0
3 years ago
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