What is the value of c?

Mathematics

2 answers:

son4ous [18]3 years ago

8 0

Answer:

c = 5

Step-by-step explanation:

ΔWYZ is a right triangle with ∠Y = 90° and WZ the hypotenuse

Using Pythagoras' identity on the triangle

c² = 3² + 4² = 9 + 16 = 25

⇒ c = $\sqrt{25}$ = 5

lara31 [8.8K]3 years ago

5 0

You have to use the Pythagoreas theorem where you do 3 squared + 4 squared=25
Then you square root 25 which is 5 so
c is 5

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Determine whether each ordered pair is a solution to the inequality x+y>−2.

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<h3>3 Answers:</h3>

Choice A. (10, -1)
Choice B. (-8, 9)
Choice D. (6, -3)

===================================

Explanation:

If we plug the coordinates of point A into the inequality, then we get

x+y > -2

10 + (-1) > -2

9 > -2

That last inequality is a true statement since 9 is to the right of -2 on the number line. That means (10,-1) is a solution. Choice A is one of the answers

Choices B and D are also answers for similar reasons.

Something like choice C is not a solution because

x+y > -2

-1+(-9) > -2

-10 > -2

which is false

You should find that choice E is false as well.

---------------------

If you graphed the inequality and all of the points mentioned (see below), then you can visually confirm the answers. Notice how points A, B and D are in the blue shaded region which is the solution set.

The point E on the boundary does not count as a solution. This is due to the lack of "or equal to" portion of the inequality sign. That visually shows point E is not a solution. Point C isn't a solution either as it's nowhere near the blue shaded region.