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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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Can someone please solve for x
RoseWind [281]

Answer:

x = -11

Step-by-step explanation:

2x + 23 + 9 = x + 21

Combine common factors

2x + 32 = x + 21

Subtract x from both sides

x + 32 = 21

Subtract 32 from both sides

x = -11

5 0
3 years ago
1. The spinner shown has six congruent sections.
kondaur [170]

Answer:

B

Step-by-step explanation:

The probability of obtaining a 3 is

P(3) = \frac{1}{6}

Then after 30 spins the predicted number of times it should land on 3 is

30 × \frac{1}{6} = 5

8 0
2 years ago
A model satellite has a scale of 1 in: 6 ft.
insens350 [35]

Answer:

B) 18 ft

Step-by-step explanation:

The scale is 1 in. model : 6 ft real.

6/1 = 6

To go from model size to real size, multiply the model size by 6 and change from inches to feet.

3 in. model = 3 × 6 ft = 18 ft

5 0
1 year ago
Andrei has a job in the circus walking on stilts. Andrei is 11/10 meters tall. The foot supports of his stilts are 23/10 meters
vovangra [49]
First, add. 11/10 + 23/10 = 34/10
You can then simplify by finding the greatest common factor (2)
34/2, 10/2 = 17/5, or 3 and 2/5 
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3 0
3 years ago
An airplane is flying at an altitude of 33,000 feet. It needs to reduce its altitude by 6% to avoid some turbulence. After it pa
Tema [17]

Step-by-step explanation:

100% = 33,000 ft

1% = 100%/100 = 33000/100 = 330 ft

6% = 1% × 6 = 330 × 6 = 1980 ft

that means the plane has to go down 1980 ft to

33,000 - 1980 = 31,020 ft

and then it goes up by 5000 ft :

31,020 + 5000 = 36,020 ft

that is the final altitude.

5 0
2 years ago
Read 2 more answers
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