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3 years ago

Kelly can type 120 words in 3 minutes. at that ate, how many words can she type in 5 minutes?

1 answer:

5 0

$\frac{120\ \text{words}}{3\ \text{minutes}} = \frac{40\ \text{words}}{1\ \text{minute}}$

$\frac{40\ \text{words}}{1\ \text{minute}} \times \frac{5}{5} = \frac{200\ \text{words}}{5\ \text{minutes}}$

Kelly can type 200 words in five minutes.

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A cable is made up of four wires. The breaking strength of each wire is a normally distributed random variable with mean 10 kN a

Bas_tet [7]

Answer:

a) μ =35.858KN

b) median cable strength =36.06KN

Step-by-step explanation:

Let X1, X2, X3, X4 represent the strength of the 4 wires.

We can find the median of the cable strength in minitab as:

Stat - Basic statistics- Display descriptive statistics-variable (C5) -statistics(median) - ok

Median cable strength is 36.06 KN

Therefore the estimate of the mean strength of the cable is 35.858 KN, and the estimate of the median cable strength is 36.06 KN.

6 0

3 years ago

If you get the answer to all of them ill mark you brainliest even if its wrong

Pavel [41]

I'm so sorry if these are wrong...

1. y=-7/5x-3

2. y=1x+6

3. y=5/4x-8

4. y=1/4x-2

5.y=-5x-2

6. y=-2/5x-3

7. y=5x+19

8. y=2x-6

9. y=-4/5x-5

10. y=-4/5x+4

7 0

3 years ago

Last week a certain brand of hand lotion cost $3.00 for a 16-ounce bottle. this week the hand lotion is on sale for $2.40 for a

Yanka [14]

$3.00-$2.40 = $0.60
$0.60/$3.00 = $0.2
$0.2x100 = 20% decrease

6 0

3 years ago

What are the zeros of the function f(x) = x2 + 5x + 5 written in simplest radical form?

Pavel [41]

$\boxed{x_{1}=\frac{-5 + \sqrt{5}}{2}} \\ \\ \\ \boxed{x_{2}=\frac{-5 - \sqrt{5}}{2}}$

<h2>Explanation:</h2>

Using the quadratic formula:

$x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \\ \\ \\ Here: \\ \\ f(x) = x^2 + 5x + 5 \\ \\ \\ So: \\ \\ a=1 \\ \\ b=5 \\ \\ c=5 \\ \\ \\ x=\frac{-5 \pm \sqrt{5^2-4(1)(5)}}{2(1)} \\ \\ x=\frac{-5 \pm \sqrt{25-20}}{2} \\ \\ x=\frac{-5 \pm \sqrt{5}}{2} \\ \\ \\ Two \ solutions: \\ \\ \boxed{x_{1}=\frac{-5 + \sqrt{5}}{2}} \\ \\ \\ \boxed{x_{2}=\frac{-5 - \sqrt{5}}{2}}$

<h2>Learn more:</h2>

Quadratic functions: brainly.com/question/12164750

#LearnWithBrainly

8 0

3 years ago

Need help, I don’t understand

Ksivusya [100]

34 Degrees because -7 - 27 = -34

4 0

4 years ago