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Varvara68 [4.7K]
3 years ago
14

16. What is the sum of 8x2 +12 - y2 and x2 - 13+8xy?

Mathematics
1 answer:
jek_recluse [69]3 years ago
5 0

Answer:

9x2-y2 + 8xy -1

Step-by-step explanation:

9x2 -1 - y2 +8xy

9x2-y2 + 8xy -1

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In which quadrant is the point (-2, -9)?​
myrzilka [38]

Answer:

3rd quadrant

Step-by-step explanation:

Given:

Point (-2, -9)

Computation:

In 1st quadrant (+ , +)

In 2nd quadrant (- , +)

In 3rd quadrant (- , -)

In 4th quadrant (+ , -)

So given point (-2, -9) is in 3rd quadrant.

4 0
3 years ago
Tickets for a concert cost eight dollars for the main floor and six dollars for the balcony If 1125 tickets were sold and the ti
cricket20 [7]

Answer:

650 tickets for the main floor and 475 tickets for the balcony were sold.

Step-by-step explanation:

From the information given, you can write the following equations:

x+y=1125 (1)

8x+6y=8050 (2), where:

x is the number of tickets for the main floor

y is the number of tickets for the balcony

First, you can solve for x in (1):

x=1125-y (3)

Second, you can replace (3) in (2):

8(1125-y)+6y=8050

9000-8y+6y=8050

9000-2y=8050

9000-8050=2y

950=2y

y=950/2

y=475

Third, you can replace the value of y in (3) to find x:

x=1125-y

x=1125-475

x=650

According to this, the answer is that 650 tickets for the main floor and 475 tickets for the balcony were sold.

8 0
3 years ago
Two similar triangles have have areas of 75 m2 and 12 m2. find the ratio of the perimeters
soldi70 [24.7K]

we know that having similar triangles so the ratio of sides,area and volume are same.

s/s=s^2/s^2

we know that s^2 will be the area of triangle.

s^2/s^2=75/12

so s/s=\sqrt{75/12}

so the ratio of the perimeter of two triangles will be

(s+s+s)/(s+s+s)=(\sqrt{75} +\sqrt{75} +\sqrt{75} )/(\sqrt{12}+\sqrt{12} +\sqrt{12} )

ratio of the perimeter=\sqrt{225} /\sqrt{36}

8 0
3 years ago
Read 2 more answers
Factorise using suitable identities<br> x^2 (y+z)^2
vredina [299]

Answer:

Step-by-step explanation:

x^2 ( y +z)^2 = x^2 (y+z)(y+z)                               [ \ (a+b)^2 = (a+b)(a+b) \ ]

x^2 - ( y +z)^2 = (x - ( y +z)) (x + (y+z))             [ \ a^2 - b^2 = (a-b)(a+b) \ ]

                  =(x-y-z)(x+y+z)                  

8 0
3 years ago
Which fraction is equivalent to 20%?​
Aleks [24]

Answer:

1/5

Step-by-step explanation:

20*5 = 100, so 20 is 1/5

4 0
3 years ago
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