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yKpoI14uk [10]
3 years ago
11

Evaluate f(x) = -x to the second power + 1 for x = -3

Mathematics
1 answer:
professor190 [17]3 years ago
5 0
I think it's 4 Yeah 4 something like that
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Which of the following are lengths of the sides of a 30°-60°-90° triangle? A. 5√3, 15., 10√3 units B. 3, 4, and 5 units C. √3, 3
zaharov [31]

Answer:

A

Step-by-step explanation:

law of sine

c/sin(C) = b/sin(B) = a/sin(A)

with the sides and corresponding angles being always opposite.

sin(90) = 1

sin(30) = 0.5

c, the Hypotenuse, is the longest side in such a right-angled triangle.

c/1 = b/0.5

b = c×0.5 = c/2

so, one side has to be half the length of the longest side (Hypotenuse).

the only answer meeting that criteria is A.

the longest side is 10×sqrt(3) = 17.32...

the side half of that is 5×sqrt(3).

and Pythagoras for such a triangle is then

c² = (c/2)² + a²

c² = c²/4 + a²

so, a² = 3c²/4

c² = c²/4 + 3c²/4

therefore we can check also the third side

15² = 3×(5×sqrt(3))² = 3×25×3 = 3×75 = 225 = 15²

correct.

A is such a triangle.

5 0
2 years ago
Which is a better deal per ounce? 24 ounces for $2. 99 or 36 ounces for $4. 99?
Shkiper50 [21]

Answer:

24 for 2.99

Step-by-step explanation:

2.99/24 = $0.1245 per ounce
4.99/36  = $0.1386 per ounce

So the 36 cost more per ounce.

5 0
2 years ago
Can someone help me with this paper really fast
Vlad1618 [11]
Sorry Can’t Just trying to be helpful
3 0
3 years ago
A A A A A A A A A A A hi i need an answerrrrrrrrrrrrrrrrr <br><br> *dies*
Dafna1 [17]

Answer:

(0,0) and (-2.5, 1.5)

Step-by-step explanation:

6 0
3 years ago
What fraction is equivalent<br> to 1 whole?<br> A. 13<br> B. 3/3<br> C. 3/1<br> D. 6/3
Evgesh-ka [11]

Answer:

b. 3/3

Step-by-step explanation:

8 0
3 years ago
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