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Eduardwww [97]
3 years ago
7

Please please help me out ASAP

Mathematics
1 answer:
likoan [24]3 years ago
4 0
The answer are c. x=-1 and e.x=1
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Write the quadratic function in vertex form.<br><br> y = x2 - 2x + 5
Jlenok [28]
Vertex form formula: y = a(x-h)^2 +k, with vertex (h,k)
There are multiple ways to find the vertex. One way is to find the roots and then find the x value exactly in between them, because this parabola is symmetrical. 

0 = (x - 3)(x + 2), so x = 3 and -2. The point directly in the middle is x = 1/2 = h 

To find the y value of the vertex, plug in 1/2 to the equation.

(1/2)^2 - 2(1/2) + 5 = 4.25 = k

y = (x - 0.5)^2 + 4.25
4 0
3 years ago
Read 2 more answers
XZ = 15 and the perimeter of XWZ is 50. What is the length of WZ?
Rom4ik [11]

Answer:

  17.5

Step-by-step explanation:

The perimeter is the sum of the side lengths:

  perimeter = XZ +WZ +WX

The figure shows us WX = WZ, so we can rewrite the formula as ...

  perimeter = XZ +2·WZ

Filling in the given values, this becomes ...

  50 = 15 + 2·WZ

  35 = 2·WZ

  35/2 = WZ = 17.5

The length of WZ is 17.5 units.

6 0
3 years ago
What is f(r) = 60 - 2/3 r when r =12?
7nadin3 [17]
F(r) = 60 - 2/3r        r = 12 
Substitute r for 12

f(12) = 60 - 2/3(12)                       12 * 2/3 = 8 

f(12) = 60 - 8 

f(12) = <u /><em><u>52</u></em><em><u /></em>  

52 is your answer

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5 0
3 years ago
If f(x)=2x^4-3x^3+2x^2+x-3, explain how you know that the equation f(x)=0 has at least one real root between x=1 and x=2
hodyreva [135]

Answer:

Step-by-step explanation:

by theorem :

f continu in [1 , 2]

f(1)×f(2) < 0 because : f(1) = -1 and f(2) = 15

so the equation f(x)=0 has at least one real root between x=1 and x=2

so :

7 0
3 years ago
There are 7 green marbles, 8 blue marbles, and 4 yellow marbles. What is the chance, as a fraction, of drawing a blue marble, an
alexandr1967 [171]
1/19 and then to draw a green marble would have to be 1/18 so I hope that helps
4 0
3 years ago
Read 2 more answers
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