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2 years ago

Please help

Mathematics

1 answer:

kati45 [8]2 years ago

6 0

Answer:

<h2>Hi, I am going to help you! </h2>

➡ 94 * 106

Formula: ( a+b) (a-b)

a=100

b=6

100+6=106

100+6=106100-6= 94

➡ 2. 100² - 6²

= (100 - 6) ( 100 + 6)

= 94 * 106

( THE BOLD IS THE FINAL ANSWER FOR BOTH QUESTIONS)

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Which variable expression matches the word phrase?

nordsb [41]

1. sum of 12 and quotient of 9 and a number
12 + (9 divided by y)

2. difference of 12 and product of 9 and a number
12 - (9 * y) or 12 - 9y

3. difference of 12 and quotient of 9 and a number
12 - (9 divided by y)

4. 12 more then the quotient of 9 and a number
12 + (9 divided by y)

6 0

3 years ago

a slitter assembly contains 48 blades five blades are selected at random and evaluated each day for sharpness if any dull blade

son4ous [18]

Answer:

P(at least 1 dull blade)=0.7068

Step-by-step explanation:

I hope this helps.

This is what it's called dependent event probability, with the added condition that at least 1 out of 5 blades picked is dull, because from your selection of 5, you only need one defective to decide on replacing all.

So if you look at this from another perspective, you have only one event that makes it so you don't change the blades: that 5 out 5 blades picked are sharp. You also know that the probability of changing the blades plus the probability of not changing them is equal to 100%, because that involves all the events possible.

P(at least 1 dull blade out of 5)+Probability(no dull blades out of 5)=1

P(at least 1 dull blade)=1-P(no dull blades)

But the event of picking one blade is dependent of the previous picking, meaning there is no chance of picking the same blade twice.

So you have 38/48 on getting a sharp one on your first pick, then 37/47 (since you remove 1 sharp from the possibilities, and 1 from the whole lot), and so on.

Also since are consecutive events, you need to multiply the events.

The probability that the assembly is replaced the first day is:

P(at least 1 dull blade)=1-P(no dull blades)

$P(at least 1 dull blade)=1-(\frac{38}{48}* \frac{37}{47} *\frac{36}{46}*\frac{35}{45}*\frac{34}{44})$

$P(at least 1 dull blade)=1-0.2931$

P(at least 1 dull blade)=0.7068

5 0

3 years ago

B) Sally has a GPA of 3.35. What percentage of the students have a GPA above her GPA? Show all work. (Note: GPA is normally dist

Cerrena [4.2K]

13 gpas are higher than 3.35. There are a total of 34 gpas. 13 divided by 34 is 0.382 (rounded to 3 dp). 0.382 x 100 = 38.2 therefore 38.2% of students have a higher gpa than Sally.

3 0

4 years ago

Copy and complete the statement using <, >, or =.

denpristay [2]

SOMEBODY PLEASE ANSWER!

7 0

3 years ago

Lyles height is twice the difference of the height of his brother, harry, and the height of his dad, vince. Lyle is 2 1/2 feet t

Greeley [361]

Answer:

$5 = 19 - 4v$

Step-by-step explanation:

We are given the following in the question:

$\text{Lyle's height} = 2( \text{Harry's height - Vince's height})$

Let l be Lyle's height, h be Harry's height and v be Vince's height.

Thus, we can write:

$l = 2(h-v)$

Lyle's Height =

$2\dfrac{1}{2}\text{ feet}$

Harry's height =

$4\dfrac{3}{4}\text{ feet}$

Putting the value in the equation:

$2\dfrac{1}{2} = 2(4\dfrac{3}{4}- v)\\\\\dfrac{5}{2} = \dfrac{19}{2} - 2v\\\\5 = 19 - 4v\\4v = 19-5\\\\v = \dfrac{14}{4}\\\\v = 3\dfrac{2}{4} = 3\dfrac{1}{2}$

Thus, Vince's height is 3.5 feet.

7 0

4 years ago