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Leto [7]
3 years ago
15

the average (arithmetic mean) of t and y is 15, and the average of w and x is 15. what is the average of t, w,x,and y

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0
Oi :)

\frac{t+y}{2}=15 \\  \\ t+y=15*2 \\ t+y=30
--------------------------------------------------------------------------------------------------------------------------
\frac{w+x}{2}=15 \\  \\ w+x=15*2 \\ w+x=30
---------------------------------------------------------------------------------------------------------------------------
Logo:
\frac{t+y+w+x}{4}=??? \\  \\  \frac{30+30}{4}  \\  \\  \frac{60}{4}   \\  \\ 15
-----------------------------------------------------------------------------------------------------------------------------
Answer = 15

Boa Noite. Bons Estudos !
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Elis [28]

Answer:

x = 36

Step-by-step explanation:

x - 12\sqrt{x} + 36 = 0

Subtract x and 36 from both sides.

-12\sqrt{x} = -x - 36

Divide both sides by -1.

12\sqrt{x} = x + 36

Square both sides.

144x = x^2 + 72x + 1296

Subtract 144x from both sides.

0 = x^2 - 72x + 1296

Factor the right side.

0 = (x - 36)^2

x - 36 = 0

x = 36

Since the solution of the equation involved squaring both sides, we musty check the answer for possible extraneous solutions.

Check x = 36:

x - 12\sqrt{x} + 36 = 0

36 - 12\sqrt{36} + 36 = 0

36 - 12\times 6 + 36 = 0

36 - 72 + 36 = 0

0 = 0

Since 0 = 0 is a true statement, the solution x = 36 is a valid solution.

6 0
3 years ago
What is the unit rate in feet per second for 240 yards/ 1 hour
Rzqust [24]
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Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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3 years ago
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