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vekshin1
3 years ago
7

How many real solutions does 4x^2+2x+5 = 0 have?

Mathematics
1 answer:
777dan777 [17]3 years ago
8 0
The answer is infinitely many
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What is the solution set of -|x|=-8
Novosadov [1.4K]

-|x|=-8

-x = - 8

x = 8

and

- (-x) = - 8

 x = - 8

Answer

x = -8 ,  8

5 0
3 years ago
In a random sample of 7 residents of the state of California, the mean waste recycled per person per day was 1.5 pounds with a s
ale4655 [162]

Answer:

CI(99%) = ( 0.93 , 2.07)

Therefore at 99% confidence interval (a,b) = ( 0.93 , 2.07)

Critical value z(at 99% confidence) = z(0.005) = 2.58

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean gain x = 1.5

Standard deviation r = 0.58

Number of samples n = 7

Confidence interval = 99%

Critical value z(at 99% confidence) = z((1-0.99)/2)

z(0.005) = 2.58

Substituting the values we have;

1.5+/-2.58(0.58/√7)

1.5+/-2.58(0.2192)

1.5+/-0.565536

1.5+/-0.57

= ( 0.93 , 2.07)

Therefore at 99% confidence interval (a,b) = ( 0.93 , 2.07)

7 0
3 years ago
If f(x)=6-2x, Find the value for f(-1)
Katarina [22]

Answer:

f(-1)=8

Step-by-step explanation:

Just plug in x=-1 into the function:

f(x)=6-2x

y=6-2(-1)

y=6+2

y=8

So f(-1)=8

7 0
3 years ago
Which one is it? Please help
nevsk [136]

Answer:

D

Step-by-step explanation:

I just did it and got it right

6 0
3 years ago
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What fractions are equivalent to 25/45
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Its 5/9 divide by five<span />
4 0
2 years ago
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