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Leviafan [203]
3 years ago
10

Please help me out with this equation! i will mark you as brainliest

Mathematics
1 answer:
densk [106]3 years ago
6 0

Answer: Choice B

  • vertex = (3, -4)
  • y intercept = (0, 5)
  • x intercepts = (1, 0) and (5, 0)
  • axis of symmetry:  x = 3

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

Explanation:

The vertex is the lowest point for parabolas that open upward like this. The lowest point is (3, -4). If the parabola is flipped upside down, then the vertex would be the highest point.

--------

The y intercept is where the graph crosses the y axis. For any function, it will have at most one y intercept (some don't have any at all but the most you can have is 1 y intercept). The graph crosses the vertical y axis at (0,5). We can say in short "the y intercept is 5". The y intercept always occurs when x = 0.

--------

On the flip side, the x intercept always occurs when y = 0. This is where the graph crosses or touches the x axis. We have two such locations of (1,0) and (5,0). In short, we could say "the x intercepts are 1 and 5". The term "root" is another word we could use in place for "x intercept". Unlike the y intercept, we can have as many x intercepts as we want.

--------

The axis of symmetry is the vertical line through the parabola. It is the x coordinate of the vertex. So it's not a coincidence that the vertex is at (3,-4) and the axis of symmetry is x = 3, with those '3's repeated twice.

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<img src="https://tex.z-dn.net/?f=tan20%2B4sin20%3D%5Csqrt%7B3%7D" id="TexFormula1" title="tan20+4sin20=\sqrt{3}" alt="tan20+4si
zepelin [54]

tan( 20 ) + 4 Sin( 20 ) =

( Sin( 20 ) / Cos( 20 ) ) + 4 Sin( 20 ) =

Sin( 20 ) + 4 Sin( 20 ).Cos( 20 ) / Cos( 20 ) =

Sin( 20 ) + 2 × 2 Sin(20).Cos(20)/ Cos(20) =

Sin( 20 ) + 2 × Sin( 40 ) / Cos( 20 ) =

Sin( 20 ) + 2Sin( 40 ) / Cos( 20 ) =

Sin( 20 ) + 2Cos( 50 ) / Cos ( 20 ) =

Sin( 20 ) + 2Cos( 20 + 30 ) / Cos( 20 ) =

________________________________

2 × Cos( 30 + 20 ) =

2 × [ Cos(30).Cos(20) - Sin(30).Sin(20) ] =

2 × [ √3/2 × Cos(20) - 1/2 × Sin(20) ] =

√3 Cos(20) - Sin(20)

_________________________________

Sin( 20 ) + 2Cos ( 20 + 30 ) / Cos( 20 ) =

Sin( 20 ) + √3 Cos(20) - Sin(20) / Cos(20) =

Sin(20) - Sin(20) + √3 Cos(20) / Cos(20) =

0 + √3 Cos(20) / Cos(20) =

√3 Cos(20) / Cos(20) =

Cos(20) simplifies from the numerator and denominator of fraction

√3 × 1 / 1 =

√3

And we're done ....

5 0
3 years ago
Whats the median for 13, 6, 24, 18, 33, 5, 13, 48, 9, 11, 36, 28, 15, 6, 13​
astraxan [27]

Answer: The median is 48

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Write an equation in slope-intercept form that passes through the given pairs of points: (2, 5) and ( 12, 1)
frosja888 [35]

Answer:

y=-6/10x+17/11

Step-by-step explanation:

1-5 keep it, change it, flip it. -6

12-2= 10

y=-6/10x+b

you can take one of the coordinates

I used (2,5) in the equation.

y is 5

m is -6/10

x is 2

-6/10x2 is -12/10

remember to drop down 5

5= -12/10+b

look for fluffy cloud -12/10 turn it to a positive and add it to five and the answer is 17/11 equals b.

4 0
2 years ago
3x = 2x + 12<br> What is the answer to this equation?
Strike441 [17]

Answer:

x=12

Step-by-step explanation:

3x=2x+12

-2x from each side

x=12

4 0
3 years ago
Read 2 more answers
Eric purchased three music CDs and a sweatshirt from a band's online store and received a 20% discount. He paid $100 for his pur
swat32

The <em>correct answers</em> are:


B) $25; and

D) $50.


Explanation:


Eric got a 20% discount. This means he paid 100%-20% = 80% of the retail value.


Let C represent the cost of CDs and S represent the cost of sweatshirts. For Eric's purchase, we have the equation:

0.8(3C+S) = 100


Using the distributive property, we have

0.8(3C) + 0.8(S) = 100

2.4C + 0.8S = 100


Neil got a 40% discount; this means he paid 100%-40% = 60% of the retail value. We have the following equation for him:

0.6(4C+2S) = 120


Using the distributive property, we have:

0.6(4C)+0.6(2S) = 120

2.4C + 1.2S = 120


This gives us the system:

\left \{ {{2.4C+0.8S=100} \atop {2.4C+1.2S=120}} \right.


Since the coefficient of C is the same in each equation, we will eliminate this variable. We do this by subtracting the equations:


\left \{ {{2.4C+0.8S=100} \atop {(2.4C+1.2S=120)}} \right.  \\ \\-0.4S=-20


We divide both sides by -0.4:

-0.4S/-0.4 = -20/-0.4

S = 50


Each sweatshirt is $50.


We will substitute this into the first equation:

2.4C+0.8(50) = 100

2.4C + 40 = 100


Subtract 40 from each side:

2.4C+40-40 = 100-40

2.4C = 60


Divide each side by 2.4:

2.4C/2.4 = 60/2.4

C = 25


Each CD is $25.

8 0
3 years ago
Read 2 more answers
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