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goldfiish [28.3K]
2 years ago
9

Can someone please help!

Mathematics
1 answer:
Fudgin [204]2 years ago
3 0

Answer:

min f(x) = 3.95  (for x= 2.5)

Step-by-step explanation:

vertex (x) = 1/0,4 = 2,5

vertex (y) = 0.2(2.5)^2-2.5+5.2 = 3.95

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if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is .....a.2 b.-2 c 1/2 d.none ​
blsea [12.9K]

Answer:

k=2

Problem:

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..

Step-by-step explanation:

Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.

So we want the following:

[(k+2)/2]^2=2k

Apply the power on the left:

(k+2)^2/4=2k

Multiply both sides by 4:

(k+2)^2=8k

Expand left side:

k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2

Subtract 8k on both sides:

k^2-4k+4=0

Factor using the identity mentioned a couple lines above:

(k-2)^2=0

Since zero squared is zero, we want k-2=0.

Adding both sides by 2 gives k=2.

8 0
3 years ago
Is it possible for any angle A, sinA=7/5Explain.​
Sedaia [141]

Answer:

No

Step-by-step explanation:

note \frac{7}{5} = 1.4

and  sinA is defined for - 1 ≤ sinA ≤ 1

Thus sinA ≠ \frac{7}{5}

4 0
3 years ago
A wildlife conservationist captures and tags 72 armadillos in a local desert. A month later she captures 78 armadillos and finds
Dominik [7]
A wildlife conservationist has is own strategies to monitor every animals that are arrived in there quarter or center before the animals are went back to its natural habitat. So 72 of the armadillos are tag went to the wild but then again 78 is captured again and record that 15 of them are tag. So there is 53 of them still has no tag. The best estimate would be 135 
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3 years ago
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Step-by-step explanation:

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3 years ago
M=? <br> find the slope (rate of change) for the table
pentagon [3]

Answer:

2

Step-by-step explanation:

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3 years ago
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