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BlackZzzverrR [31]
2 years ago
9

Solve by completing the square

Mathematics
1 answer:
xz_007 [3.2K]2 years ago
7 0

Step-by-step explanation:

{x}^{2}  + 2x - 2 = 0

Now Adding three on both sides we get

{x}^{2}  + 2x - 2 + 3 = 0 + 3

{x}^{2}  + 2x + 1 = 3

{(x + 1)}^{2}   = 3

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motikmotik

Answer:

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Step-by-step explanation:

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3 years ago
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Whats 20 inches and 7 feet as a fraction in simpalist form
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4 4/7 feet is it's simplest form because 20 I'm chea equal 1.67 feet and 7 feet equals 84 inches so do 20 × 4 = 80 then you would have 4 left over and turn that into 4/7
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3 years ago
>> The total cost of a pizza and 3 drinks is $19. The price of the pizza is $10 and each drink is the
pentagon [3]

Answer:

d = 3

Step-by-step explanation:

According the figure:

  • 10 + d + d + d = 19
  • d = 3

Answer Check Below:

⇒ 10 + 3 = 13

⇒ 13 + 3 = 16

⇒ 16 + 3 = 19

<h2>Therefore, d = 3.</h2>
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6 0
3 years ago
At the city museum, child admission is $6.10 and adult admission is $9.90. On Friday, 142 tickets were sold for a total sales of
antoniya [11.8K]

Answer:

no of child tickets sold were 58

Step-by-step explanation:

Let the number of child ticket sold be x

cost of 1 child ticket = $6.10

Total cost of x child ticket = x*cost of 1 child ticket = = $6.10x

Let the number of adult ticket sold be y

cost of 1 adult ticket = $9.90

Total cost of y adult ticket = y*cost of 1 adult ticket = = $9.90y

Given total ticket sold = 142

Thus,

number of child ticket sold +  number of adult ticket sold = 142

x + y = 142   - equation 1

x = 142 -y  

Total sales of ticket = $1185.40

total sales of ticket  = Total cost of x child ticket + Total cost of x a dult ticket

6.10x + 9.90y = 1185.40

in this equation substituting x = 142 - y from equation 1

6.10(142 - y )  + 9.90y = 1185.40

=>866.2 - 6.10y + 9.90y = 1185.40

=> 3.80y = 1185.40 - 866.2

=> 3.80y = 319.2

=> y = 319.2/3.80 = 84

Thus, y = 84

x = 142 - y  = 142 - 84 = 58

Thus, no of child tickets sold were 58

6 0
3 years ago
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