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antiseptic1488 [7]
3 years ago
8

Help!

Mathematics
2 answers:
Ostrovityanka [42]3 years ago
8 0

Answer:

a

Step-by-step explanation: I looked it up

saw5 [17]3 years ago
3 0

Answer:

( a )   The system of equations:

2 r + b = 8.40

3 r + b = 9.35

( c )  Each item costs:

b = $6.50,  r = $0.95

Step-by-step explanation:

Is it right? Tell me if it isn't.

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Every month, Jim makes $49 less than his best friend Keenan.
ad-work [718]

Answer:

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2 years ago
The parabola opens upward has x = 2 as an axis of symmetry and contains the non -vertex points (1, 9) and (4, 27) write the equa
Sedaia [141]

Answer:

<h3>               f(x) = 6(x - 2)² + 3</h3>

Step-by-step explanation:

f(x) = a(x - h)² + k    - vertex form of the equation of the parabola with vertex (h, k)

"the parabola opens upward" means:  a>0

"the parabola has x = 2 as an axis of symmetry" means:  h = 2

so f(x) = a(x - 2)² + k

"the parabola contains the point (1, 9)" means:

9 = a(1 - 2)² + k

9 = a(-1)² + k

9 = a + k

k = 9 - a

"the parabola contains the point (4, 27)" means:

27 = a(4 - 2)² + k

so:

27 = a(2)² + 9 - a

27 = 4a + 9 - a

3a = 18

a = 6

and  k = 9 - 6 = 3

Therefore the vertex form for this parabola is:

                                     <u> f(x) = 6(x - 2)² + 3</u>

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3 years ago
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