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3 years ago

ONLY ANSWER IF YOU KNOW THIS ILL GIVE CORRECT ANSWER BRAINLIEST

Mathematics

1 answer:

coldgirl [10]3 years ago

5 0

Answer:

x = -1 is the negative solution

Step-by-step explanation:

x² - 4 = 3x

x² - 3x - 4 = 0

(x - 4)(x + 1) = 0

x = 4 and x = -1.

x = -1 is the negative solution

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Joanna splits 3 pitches of water equally among her 8 plants.what fraction represents this division??

KATRIN_1 [288]

3/8.

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6 0

3 years ago

Read 2 more answers

What is m∠A? Please explain how you got your answer ;;

Ierofanga [76]

M<E = 180 - 43 - 35 = 102
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m<A = 60

3 0

3 years ago

without graphing what is the equation for THE LINE THAT PASSES THROUGH THE POINTS (-4, 3) AND (6 -2)

mojhsa [17]

Answer:

The answer to your question is: y = -1/2 x + 1

Step-by-step explanation:

Data

A (-4 , 3)

B (6, -2)

Formula

$m = \frac{y2 - y1}{x2 - x1} \\$

(y - y1) = m(x - x1)

Process

$m = \frac{-2 - 3}{6 + 4}$

$m= \frac{-5}{10}$

$m = -\frac{1}{2}$

(y - 3) = -1/2 (x + 4)

2(y - 3) = -1(x + 4)

2y - 6 = -x - 4

2y = - x - 4 + 6

2y = - x +2

y = -1/2 x + 1

3 0

3 years ago

Jimmy Andrew and Richard collect comic books. Jimmy has five more comic books than Andrew, and Richard has four times as many co

adell [148]

Answer: Andrew = 20

Jimmy = 25

Richard = 100

Step-by-step explanation:

Let the number of Andrew's comic books be y.

Jimmy has five more comic books than Andrew. This means Jimmy has: y+5

Richard has four times as many comic book as jimmy. This means Richard has: 4(y+5) = 4y + 20

Since there are 145 comic books together. This can be rewritten as:

y + (y+5) + (4y+20) = 145

6y+25 = 145

6y = 145 - 25

y = 120/6

y = 20

Andrew has 20 comic books

Jimmy has five more comic books than Andrew. Jimmy has: 20+5 = 25

Richard has: 4y + 20 = 4(20) + 20 = 100

5 0

3 years ago

To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19 randomly selected dowels and find

loris [4]

Answer:

Option D - $[0.12$

Step-by-step explanation:

Given : The manufacturer measures 19 randomly selected dowels and finds the standard deviation of the sample to be s=0.16.

To find : The 95% confidence interval for the population standard deviation sigma?

Solution :

Number of sample n=19

The degree of freedom is Df=n-1=19-1=18

The standard deviation of the sample is s=0.16

Applying chi-square table to find critical value,

Upper critical value of $\chi^2$ is $UC=\chi(\frac{0.05}{2},18) = 31.5264$

Lower critical value of $\chi^2$ is

$LC=\chi(1-\frac{0.05}{2},18) = 8.2307$

Lower limit of the 95% confidence interval for the population variance

$L=\frac{(df)\times (s^2)}{UC}$

$L=\frac{18\times (0.16^2)}{31.5264}$

$L=\frac{18\times0.0256}{31.5264}$

$L=\frac{0.4608}{31.5264}$

$L=0.0146$

Upper limit of the 95% confidence interval for the population variance

$U=\frac{(df)\times(s^2)}{LC}$

$U=\frac{18\times (0.16^2)}{8.2307}$

$U=\frac{18\times0.0256}{8.2307}$

$U=\frac{0.4608}{8.2307}$

$U=0.0559$

So, The 95% confidence interval for the population variance is [0.0146, 0.0560]

Now, The 95% confidence interval for the population standard deviation is

$[\sqrt{0.0146}$

$[0.1208$

or $[0.12$

Therefore, Option D is correct.

The 95% confidence interval for the population standard deviation is $[0.12$

6 0

3 years ago