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Tresset [83]
3 years ago
13

Help me ASAP it’s a math test

Mathematics
1 answer:
expeople1 [14]3 years ago
4 0

Answer:

I would say the last one, bc b Is negative correct?

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The equation x2 16 + y2 9 = 1 defines an ellipse, which is graphed above. in this excercise we will approximate the area of this
Citrus2011 [14]
(a) 4 
(b) y = sqrt(9 - (9/16)x^2)  
The best guess to the formula using knowledge of the general formula for an ellipse is: 
x^2/16 + y^2/9 = 1  
(a). An ellipse is reflectively symmetrical across both the major and minor axis. So if you can get the area of the ellipse in a quadrant, then multiplying that area by 4 would give the total area of the ellipse. So the factor of 4 is correct. 
 (b). The general equation for an ellipse is not suitable for a general function since it returns 2 y values for every x value. But if we restrict ourselves to just the positive value of a square root, that problem is easy to solve. So let's do so:
 x^2/16 + y^2/9 = 1
 x^2/16 + y^2/9 - 1 = 0
 x^2/16 - 1 = - y^2/9
 -(9/16)x^2 + 9 = y^2
 9 - (9/16)x^2 = y^2
 sqrt(9 - (9/16)x^2) = y
 y = sqrt(9 - (9/16)x^2)
4 0
3 years ago
What is a polynomial​
Alja [10]

Answer:

Polynomials are algebraic expressions that consist of variables and coefficients. ... We can perform arithmetic operations such as addition, subtraction, multiplication and also positive integer exponents for polynomial expressions but not division by variable. An example of a polynomial with one variable is x2+x-12.

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Why do tornadoes kill people
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4 0
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Answer: the price per charm

Step-by-step explanation:

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Step-by-step explanation:

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