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ArbitrLikvidat [17]
3 years ago
6

Question 20 points if correct

Mathematics
2 answers:
True [87]3 years ago
7 0
Is This On Khan Academy because I be needing help
Vlada [557]3 years ago
5 0

Answer:

B = 155° , C = 25° , D = 155°

Step-by-step explanation:

Given

A = 25°

C = A = 25° [ Vertically Opposite angles ]

Now

A + B = 180°( being linear pair)

25° + B = 180°

B = 180° - 25°

B = 155°

Also

D = B = 155°( vertically opposite angles )

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What is the vertex form, f(x) = a(x − h)2 + k, for a parabola that passes through the point (1, −7) and has (2, 3) as its vertex
kondaur [170]

Answer:

Vertex form: f(x) = -10(x − 2)^2 + 3

Standard form: y = -10x^2 + 40x - 37

Step-by-step explanation:

h and k are the vertex coordinates

Substitute them in the vertex form equation:

f(x) = a(x − 2)^2 + 3

Calculate "a" by replacing "f(x)" with -7 and "x" with 1:

-7 = a(1 − 2)^2 + 3

Simplify:

-7 = a(1 − 2)^2 + 3

-7 = a(-1)^2 + 3

-7 = a + 3

-10 = a

Replace a to get the final vertex form equation:

f(x) = -10(x − 2)^2 + 3

Convert to standard form:

y = -10(x − 2)^2 + 3

Expand using binomial theorem:

y = -10(x^2 − 4x + 4) + 3

Simplify:

y = -10x^2 + 40x - 40 + 3

y = -10x^2 + 40x - 37

6 0
3 years ago
what is the greatest number of tables you could use to serve dinner to 55 guest so that each table has a different number of gue
Natali [406]
15 because it fits with the 55
5 0
3 years ago
Y=−4(x+2) ^2 −1. Graph the equation
Kitty [74]

Answer:

4x^2+15

Step-by-step explanation:

1. multiply whole parenthesis by power of 2

2. gets you 4(x^2+4)-1

3.Multply and it gets you 4x^2+16-1 so it would be 4x^2+15 for your answer

4. throw that into your calculator and make sure its not on radian mode and then press graph

3 0
3 years ago
The height of Mount Everest is times the height of a waterfall.
Hatshy [7]

Answer:

true

The height of Mount Everest is times the height of a waterfall.

8 0
3 years ago
(4 + y = 19) what is y
Fiesta28 [93]
4 + y = 19

y = 19 - 4

y = 15
5 0
3 years ago
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