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Marianna [84]
3 years ago
12

PLEASE HELP 46 POINTS!!!

Mathematics
1 answer:
matrenka [14]3 years ago
8 0

Answer:

Step-by-step explanation:

a) Input = -9   ⇒ x = -9

y = x² + 3

Plugin x = (-9),

y = (-9)² + 3  

  =  81 +  3                {(-9)² = -9 * (-9) = 81}

y = 84    ---> Output

y = √x - 2

  = √-9 - 2          { i² = -1}

  = \sqrt{3*3 * i^{2}}-2\\\\=3i -2    

y = 3i - 2  ------> Output

b) Output = 0

y  = x² + 3

x² + 3 = 0

x² = -3

x = \sqrt{-3}=\sqrt{3i^{2}}\\\\x = i \sqrt{3}

y = √x -2

0 = √x - 2

√x = 2

Take square,

(\sqrt{x})^{2}=2^{2}\\\x = 4

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Answer:

Step-by-step explanation:

What graph

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3 years ago
Which of the following points solves the system shown below?
IrinaVladis [17]

Answer:

(3,6)

Step-by-step explanation:

Collect like terms

y -5x = -9

y + 2x = 12

Using elimination method

Subtract equation 2 from equation 1

y - 5x = -9

y + 2x = 12

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0. -7x = -21

Divide both sides by -7

-7x = -21

---- -----

-7 -7

x = 3

Substitute x=3 into equation 1

y = 5(3) - 9

y = 15 - 9

y = 6

Solution is (x,y) = (3,6)

6 0
3 years ago
What is the sum of 667 and 23?<br> A. 29<br> B. 690<br> C. 644<br> D. 15,341
butalik [34]
If you would like to know what is the sum of 667 and 23, you can calculate this using the following steps:

the sum of 667 and 23:
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3 years ago
Read 2 more answers
PLEASE ANSWER...I WILL MARK WHOEVER ANSWERS FIRST BRAINLIEST!!!
klemol [59]

Answer:

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Step-by-step explanation:

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The Niagara Falls ferris wheel has a diameter of 48 meters, and one revolution takes 2.25 minutes to complete. Riders can see Ni
Yanka [14]

The time intervals when the riders could see Niagara falls are; 0.834 < t < 1.416 and (3.084, 3.666)

<h3>How to interpret Cycle Graphs?</h3>

From the diagram attached, we can say that;

Period = 2π/k

where;

k = 2π/2.25

k = 8π/9

Thus;

h(t) = -(48/2) cos (8π/9)t + ((48/2) + 0.5)

h(t) = -24cos (8π/9)t + 24.5

Riders can see Niagara falls if they are higher than 41 meters above the ground. Thus;

41 = -24cos (8π/9)t + 24.5

41 - 24.5 = -24cos (8π/9)t

16.5 = -24cos (8π/9)t

-0.6875 = cos (8π/9)t

cos⁻¹0.6875 = (8π/9)t

t = 0.834 min

Thus, time interval is between;

0.834 < t < (2.25 - 0.834)

⇒ 0.834 < t < 1.416 and

(2.25 + 0.834) < t < (2.25 + 1.416)

⇒ (3.084, 3.666)

Read more about Cycle Graphs at; brainly.com/question/24461724

#SPJ1

4 0
2 years ago
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