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4 years ago

Factor m2+8m=7=0 How do I factor this

Mathematics

1 answer:

Yanka [14]4 years ago

6 0

1. m = 7
2. m = 1
I just got this and from my bro I hope did helps

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A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

Lelu [443]

Answer:

95% Confidence interval: (0.375,0.377)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 0.376 cc/cubic meter

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation, s = 0.0012

Degree of freedom =

$=n-1\\=15-1\\=14$

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.145$

$0.376 \pm 2.145(\dfrac{0.0012}{\sqrt{15}} )\\\\ = 0.376 \pm 0.0006\\\\ = (0.3754,0.3766)\approx (0.375,0.377)$

(0.375,0.377) is the required 95% confidence interval for the population mean potassium chloride concentration.

5 0

3 years ago

carol is making baby blankets for her daughters twins. If one blanket needs 43/4 yd of fabric, how much fabric does carol need f

elena-s [515]

Answer:

21 1/2 yd

Step-by-step explanation:

43/4 + 43/4 = 21 1/2 yd

6 0

3 years ago

J = x*2 − 0.49

AVprozaik [17]

According to the given information the result: m < k < j

The correct option is E.

<h3>What is negative integer?</h3>

A number with a minus (-) sign before it is said to be negative if its value is always less than zero. The left side of zero on a number line is where negative numbers are displayed. A couple more negative values include -6 and -15.

<h3>According to the given information:</h3>

Given that x is a negative integer, j must be positive because the least negative number, which is k, yields a negative number when squared. Also negative will be m.

J has the largest value, as far as we are aware.

For all x values, it is impossible to compare k and m. When x=1 and k=1 respectively, m and k are smaller.

To know more about negative integer visit:

brainly.com/question/15276410

#SPJ4

7 0

2 years ago

A grocery store purchases bags of chips for $2 and marks up the price by 162%. The store is having a sale where everything is on

drek231 [11]

Answer:

4.62

Step-by-step explanation: