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3 years ago

HELPPPP THXX PLAAAAASSSSSSSS

Mathematics

1 answer:

nadezda [96]3 years ago

7 0

Answer:

Step-by-step explanation:

interior angles add up to 180

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If the vertex of a parabola is at (2, 3) and the point (0, -1) is also on the parabola, find an equation for the parabola. Write

STALIN [3.7K]

Answer:

$y=-1(x-2)^2+3$

Step-by-step explanation:

W have been given that the vertex of a parabola is at (2, 3) and the point (0, -1) is also on the parabola. We are asked to find the equation of parabola in the form $y=(x-h)^2+k$ .

We know that vertex form of parabola in form $y=a(x-h)^2+k$ , where (h,k) in vertex of parabola.

Upon substituting coordinates of vertex, we will get:

$y=a(x-2)^2+3$

To find the value of a, we will substitute coordinates of point (0, -1) as:

$-1=a(0-2)^2+3$

$-1=a(4)+3$

$-1=4a+3$

$-1-3=4a+3-3$

$-4=4a$

$\frac{-4}{4}=\frac{4a}{4}$

$-1=a$

Therefore, our required equation would be $y=-1(x-2)^2+3$ .

3 0

3 years ago

Need help on number 10 pls due tmr!!!!

qaws [65]

Answer:

try doing cross out way

Step-by-step explanation:

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2 years ago

What is the mean of 48, 46, 52, 57, 58, 52, 61, 56?

ioda

Answer:

53.75

Step-by-step explanation:

its the average of the #'s

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4 years ago

Find the number that belongs in the green box,<br><br>round your answer to the nearest tenth.

alex41 [277]

Answer:61.3

Step-by-step explanation:

Using the Law of Sines, you get this formula

sin(angleA)=(a*sin(angleB))/b

sin(angleA)=(14*sin(70)/15)

sin(angleA)=(.88)

angleA=sin-1(.88)

angleA=61.3

6 0

3 years ago