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2 years ago

Please answer correctly !!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!

Mathematics

2 answers:

slavikrds [6]2 years ago

8 0

Answer:

D. 180°

I hope this helps!

ddd [48]2 years ago

3 0

Answer:

180

Step-by-step explanation:

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25x^2+9y^2+72y-81=0. Find the standard form of the equation by completing the square. Then identify and graph each conic.

olasank [31]

25x² + 9y² + 72y - 81 = 0
 25x² + 9y² + 72y - 81 + 81 = 0 + 81
 25x² + 9y² + 72y = 81
 25x² + 9(y² + 8y + 16) = 81 + 9(16)
 25x² + 9(y² + 4y + 4y + 16) = 81 + 144
 25x² + 9(y(y) + 4(y) + 4(y) + 4(4)) = 225
 25x² + 9(y(y + 4) + 4(y + 4)) = 225
 25x² + 9(y + 4)(y + 4) = 225
 25x² + 9(y + 4)² = 225
 225 225 225
 x² + 9(y + 4)² = 1
 25 25

The conic section is an ellipse.

8 0

2 years ago

In a completely randomized design involving four treatments, the following information is provided. Treatment 1 Treatment 2 Trea

NeTakaya

Answer:

Option (b) 36.7

Step-by-step explanation:

Data provided in the question:

Treatment 1 Treatment 2 Treatment 3 Treatment 4

Sample Size 50 18 10 17

Sample Mean 32 36 42 48

Now,

The overall mean is calculated as

= $\frac{\sum_{i = 1}^{4} n_i X_i}{\sum_{i = 1}^{4} {n_i}}$

Here, Xi = Sample mean

n = sample sizes

Thus,

Overall mean

= [ (50 × 32) + (18 × 36) + (10 × 42) + (17 × 48) ] ÷ [ 50 + 18 + 10 + 17 ]

= [ 1600 + 648 + 420 + 816 ] ÷ 95

= 36.67 ≈ 36.7

hence,

Option (b) 36.7

7 0

3 years ago

HELP ME ASAP 29 POINTS

Naya [18.7K]

The range means the y values. The points are written as: (x,y)

So, the right answer is {1,2,3} not the C because the range only needs to be told once.

Hope this helped and pls mark as brainliest!

~ Luna

6 0

3 years ago

PlZ HELP (DIVIDING BY DECIMAL) WILL GIVE BRAINLIEST

Evgesh-ka [11]

Answer: just remove the decimal so 350/ 76 =

Step-by-step explanation: easy

7 0

3 years ago

Can anybody help me please

Alexxandr [17]

Step-by-step explanation:

I think you are clear. You can follow me to get more answers. Thanks.