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LekaFEV [45]
3 years ago
11

If x+y=10 and x-y=6 , what is the value of x³-y³​

Mathematics
1 answer:
ohaa [14]3 years ago
6 0

Answer:

\huge\boxed{x^3-y^3=508}

Step-by-step explanation:

\underline{+\left\{\begin{array}{ccc}x+y=10\\x-y=6\end{array}\right}\qquad|\text{add the sides  of the equations}\\.\qquad2x=16\qquad|\text{divide both sides by 2}\\.\qquad\boxed{x=8}\\\\\text{Substitute it to the first equation}\\8+y=10\qquad|\text{subtract 8 from both sides}\\\boxed{y=2}\\\\x^3-y^3=8^3-2^3=512-8=504

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Find the approximate value of the circumference of a circle with the given radius. Use = 3.14. Round your answer to the nearest
blsea [12.9K]
The circumference of a circle:
C = 2 r π
If r = 5.1 cm:
C = 2 · 5.1 · 3.14 = 32.028 cm ≈ 32.03 cm
Answer:
The approximate value of the circumference is 32.03 cm ( rounded to the nearest hundredth ).
7 0
3 years ago
a man sold two typewriters it 2970 each. if he gain 10% on one in 10% loss on father what is his gain or loss percent​
kipiarov [429]

original price of first typewriter = x  

2970/x = 110/100  

x = 2970 x 100/110 = 2700  

Price of first typewriter = Rs 2700  

Original price of second typewriter = y  

2970/y = 90/100  

y = 2970 x 100/90  

y = 3300  

Original price of second typewriter = 3300  

profit from first typewriter = 2970 - 2700 = 270  

Loss from second typewriter =  3300 - 2970= 330  

270 less than 330  

so he lost 330 - 270 = Rs 60 in whole transaction

3 0
3 years ago
The cost of a gallon of gas recently doubled. By what percent did it increase? A) 50% B) 100% C) 150% D) 200%
drek231 [11]
Hey there!

If a cost of a gallon recently doubled, then it increased by 50%. This is because half of 100% is 50% and it takes one more 50% to double.

Hope this helps you.
Have a great day!
5 0
3 years ago
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zubka84 [21]

Answer:

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3 0
3 years ago
1. Determine whether the following numbers could be the sides of a right triangle. Show your work.
sergejj [24]

Answer:

B 17,15,8

Step-by-step explanation:

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7 0
2 years ago
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