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Aleksandr [31]
4 years ago
14

Which of the following are quadratic functions? Check all that apply.

Mathematics
2 answers:
Elanso [62]4 years ago
8 0
B and c, anything with an x^2 term is a quadratic.
ddd [48]4 years ago
7 0

Answer: B and c

Step-by-step explanation: B and c

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(-6)(2)+(-8/4)<br>What is the Value of this Expression
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Whats the perfect square of 63 rounding it to the hundreths place
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If sin a = - 4/5<br>and cos a &gt; 0, find tan a and sec a.​
Nina [5.8K]

Answer:

tan(a) = -4/3

sec(a) = 5/3

Step-by-step explanation:

sine is opposite over hypotenuse.  so no we have a triangle with a hypotenuse of 5 and an opposite side relative to some angle a of -4.  the hypotenuse is never negative.  

so draw a right triangle, mark one of the non right angles as a then the side opposite to that is -4 and the hypotenuse is 5.  use the pythagorean theorem to find the remaining angle.  The result could be positive or negative, but the questions specifically tells us we want the positive version.

b^2 + -4^2 = 5^2

b = 3

tangent is opposite over adjacent.  for a we know the opposite is 3now so tan(a) = -4/3

Now, secant is 1/cos, so lets find cos(a)

cos is adjacent over hypotenuse, and we jsut found the adjacent is 3.  so cos(a) = 3/5

Now 1/cos(a) = hypotenuse over adjacent so 5/3

7 0
3 years ago
Staph the inequality and plot a point in the solution set. Explain how you know the point is a solution.
seropon [69]

Answer:

The points when graphed are: (3,0) and (0,-5)

Step-by-step explanation:

I know that these points are a solution to the graph because it has one x value and one y value that stays constant.

For an example, if we used an X and Y table we could see that each variable has one other variable.

This is how it look like when graphed:

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