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Oksanka [162]
3 years ago
9

I know I've asked a bunch of questions but I reallyyyy need help on math

Mathematics
2 answers:
lys-0071 [83]3 years ago
8 0

Answer:

i think its d

sammy [17]3 years ago
7 0
I believe it’s the last one
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If \: x + y + z = 0 \: then \: show \: that \: {x}^{3} + {y}^{3 } + {z}^{3} =3xy<br>​
tankabanditka [31]

Answer:

Given

x+y+z=0

⟹x+y=−z

Cubing on both sides

(x+y) 3 =(−z) 3

⟹x 3 +y 3 +3x 2y+3xy 2 =−z 3

⟹x 3 +y 3 +3xy(x+y)=−z 3

⟹x 3+y 3+3xy(−z)=−z 3

⟹x 3 +y 3−3xyz=−z 3

⟹x 3 +y 3 +z 3 =3xyz

Step-by-step explanation:

Hope it is helpful.....

8 0
2 years ago
If f(x)=81, what is x?
Allushta [10]

Answer:

There's not enough information...

7 0
2 years ago
If it took 3 people 10 hours to plant a large garden, how long would it take one person? plzz help
ivanzaharov [21]
30 hours. hope this helps :)
6 0
2 years ago
Read 2 more answers
Candy is on sale for $0.75 each. you have a coupon for $0.25 off your total purchase. Write a function rule for the cost of n pi
alekssr [168]
<span>The answer is B. C(n) = 0.75n - 0.25.
Let n be the number of pieces. The price for 1 piece is $0.75. The price C for n pieces without a coupon is n * $0.75: C(n) = 0.75n. The coupon value is $0.25. So, this value must be subtracted from the total price of n pieces. Since the coupon values in independent on the number of pieces, the price C for n pieces with the coupon will be: C(n) = 0.75n - 0.25. Therefore, the correct choice is B.</span>
4 0
3 years ago
Jamal has $ 15.00 to spend at the concession stand. He buys nachos for $7.50, and he wants to purchase some Sour Straws for $1.5
soldier1979 [14.2K]

Answer: 5 sour straws

Step-by-step explanation: If he spends 7.50, then he still has 7.50 left. 7.50 / 5= 1.50

4 0
3 years ago
Read 2 more answers
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