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jek_recluse [69]
3 years ago
14

Rozwiąż równanie kwadratowe: 3/4 y^2 +9=y/2+(y-3)^2

Mathematics
1 answer:
lutik1710 [3]3 years ago
5 0
Najpierw rozszerz po prawej strony równania.

\dfrac34y^2+9=\dfrac y2+(y-3)^2\implies\dfrac34y^2+9=\dfrac y2+y^2-6y+9

Przenieść wszystko na jedną stronę i uproszcz.

\dfrac{y^2}4-\dfrac{11y}2=0

Rozkładaj lewą stronę na czynniki.

\dfrac14y(y-22)=0

Są dwa rozwiązania,

y=0\text{ i }y=22
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Your estimate that the length of a board is 24 feet. The actual length of the board is 22 feet. Find the percent error.
Tresset [83]

Answer:

9.09%

Step-by-step explanation:

You over estimated by 2 feet.  Find out how much 2 feet of 22 is by dividing 2 by 22...

2/22 = 0.090909090909

To convert a decimal to a percent, multiply the decimal by 100%

0.0909090909(100%) = 9.0909090909% or 9.09%

5 0
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3(x-2)+4(x-2)-5(x-2)
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Answer:

2x - 4

Step-by-step explanation:

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3 years ago
A new washing machine uses 45% less water than an older
enot [183]

Answer:The family will use 792 gallons of water in the new washing machine

Step-by-step explanation:

1440 X 0.55=792

100-45=55

5 0
3 years ago
There are 26 students in Jenna's class. Jenna brought in 16 cupcakes. Which equation can be used to find the number of cupcakes
Olin [163]

Answer:

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
Given P(A) = 0.36, P(B) = 0.2 and P(ANB) = 0.122, find the value of P(AUB), rounding to the nearest thousandth, if necessary.​
aliya0001 [1]

Answer:

The value of P(AUB) = 0.438

Step-by-step explanation:

Given:

P(A) = 0.36

P(B) = 0.2

P(A∩B) = 0.122

Find:

The value of P(AUB)

Computation:

P(AUB) = P(A) + P(B) - P(A∩B)

The value of P(AUB) = 0.36 + 0.2 - 0.122

The value of P(AUB) = 0.56 - 0.122

The value of P(AUB) = 0.438

7 0
2 years ago
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