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Lana71 [14]
2 years ago
9

SUPER EASY, WILL GIVE BRAINLIEST What’s the domain of quadratic functions?

Mathematics
2 answers:
Snowcat [4.5K]2 years ago
6 0

Answer:

1st option!!

Good Luck!!!

Zigmanuir [339]2 years ago
3 0

Answer:

[0,∞)

I hope this is good enough:

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17. Farimah and Helio are standing 15 ft. apart from each other and looking up at a kite that is with the flying between them. F
miss Akunina [59]

Answer:

Helio is 53.2 feet from the kite ⇒ the last answer

Step-by-step explanation:

* Lets change this story problem to a trigonometry problem

- Assume that there is a triangle joining between the

 kite, Farimah and Helio

- The name of the triangle is KFH, where K position of the kite,

 F position of Farimah and H is the position of Helio

∵ Farimah and Helio are standing 15 feet apart from each other

∴ FH = 15 feet

∵ Farimah is flying the kite on a 57 feet string at an angle

 of 68 with the ground

∴ FK = 57 feet

∴ m∠KFH = 68°

∵ We need to know that Helio is how far from the kite

∴ We need to calculate the length of KH

* Now lets find the best way to find the length of KH

 using the trigonometry

- We have the length of two sides and the measure of the included

 angle between them , then the best way is the cosine Rule

* Lets explain the cosine rule:

- In ΔABC:

∵ a is the length of the side opposite to ∠A ⇒ a is BC

∵ b is the length of the side opposite to ∠B ⇒ b is AC

∵ c is the length of the side opposite to ∠C ⇒ c = AB

∴ a² = b² + c² -2bc × cos(A)

∴ b² = a² + c² -2ac × cos(B)

∴ c² = a² + b² -2ab × cos(C)

* We will use the rule in our problem to find HK

∵ FH is k , HK is f , KF is h

∴ f² = h² + k² - 2hk × cos(F)

∵ h = 57 feet , k = 15 feet , m∠F = 68°

∴ f² = (57)² + (15)² - 2(57)(15) × cos(68) = 2833.4227

∴ f = √2833.4227 = 53.2 feet

* Helio is 53.2 feet from the kite

 

7 0
3 years ago
Rovan can make 48 tarts per hour. complete the table below:
GarryVolchara [31]

Answer:

A.) in 6 hours Rovan can make 288 tarts

B. at this rate it'll take Rovan about 2 and a half hours to make 120 tarts

Step-by-step explanation:

so if Rovan can make 48 tarts an 1 hour take 48 and multiply it by the hours to find out how many tarts he can make

48 x 1 =48

48 x 2 =96

48 x 3 =144 .....

48 x 6 =288

A.) in 6 hours Rovan can make 288 tarts

B. at this rate it'll take Rovan about 2 and a half hours to make 120 tarts

3 0
3 years ago
Read 2 more answers
What is the constant of proportionality in the equation y=25X?
Ad libitum [116K]

Answer:

Step-by-step explanation:

y = kx

If y = 25x , then k = 25

5 0
3 years ago
Help pls! will do a 100 point giveaway someone pls help
Tomtit [17]

Answer:

$7,865,000 + (Claire's cases)

Step-by-step explanation:

Euro 2,500,000 x 1.13 = $2825000

£4,000,000 x 1.26 = $5040000

$5040000 + $2825000 = $7865000

3 0
3 years ago
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Help please I need this in less than 2 mins
Masja [62]

Answer:

4 - 3j

Step-by-step explanation:

4 0
3 years ago
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