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Zina [86]
3 years ago
15

I need help with this question

Mathematics
1 answer:
aivan3 [116]3 years ago
4 0

Answer:

(C). \frac{22\pi }{3} yd.

Step-by-step explanation:

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Which expression is equivalent to 18x2 – 50?
kondor19780726 [428]

Answer:

(3) 2(3x - 5)(3x + 5)

Step-by-step explanation:

18 {x}^{2}  - 50 \\  = 2(9 {x}^{2}  - 25) \\  = 2(3x - 5)(3x + 5)

6 0
3 years ago
in a factory that manufactures tires, a machine responsible for molding the tire has a failure rate of 0.2%. If 1,000 tires are
goldfiish [28.3K]
Okay, so let's find the actual failure rate first. 6/1000 times 100 (to give over a 100%) equals to 0.6. The actual failure rate is 0.6%. The theoretical probability is 0.2% 0.6-0.2=0.4. The difference is 0.4%. 
Hope that helped!
4 0
3 years ago
Read 2 more answers
In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select 3 vials from the shipment, in how many wa
Elden [556K]

Answer: 27434

Step-by-step explanation:

Given : Total number of vials = 56

Number of vials that do not have hairline cracks = 13

Then, Number of vials that have hairline cracks =56-13=43

Since , order of selection is not mattering here , so we combinations to find the number of ways.

The number of combinations of m thing r things at a time is given by :-

^nC_r=\dfrac{n!}{r!(n-r)!}

Now, the number of ways to select at least one out of 3 vials have a hairline crack will be :-

^{13}C_2\cdot ^{43}C_{1}+^{13}C_{1}\cdot ^{43}C_{2}+^{13}C_0\cdot ^{43}C_{3}\\\\=\dfrac{13!}{2!(13-2)!}\cdot\dfrac{43!}{1!(42)!}+\dfrac{13!}{1!(12)!}\cdot\dfrac{43!}{2!(41)!}+\dfrac{13!}{0!(13)!}\cdot\dfrac{43!}{3!(40)!}\\\\=\dfrac{13\times12\times11!}{2\times11!}\cdot (43)+(13)\cdot\dfrac{43\times42\times41!}{2\times41!}+(1)\dfrac{43\times42\times41\times40!}{6\times40!}\\\\=3354+11739+12341=27434

Hence, the required number of ways =27434

5 0
3 years ago
A chameleon is looking for prey. Let positive numbers represent the elevation of prey above the chameleon and negative numbers r
alexira [117]

Answer:

B: The elevation of the chameleon

Step-by-step explanation:

The Fly is <em><u>above</u></em> the chameleon, so its elevation should be represented by a "positive number"(Example of positive number: 16)

Also,

The Grasshopper is <em><u>below </u></em>the chameleon, so its elevation should be represented by a "negative number"(Example of negative number: -23)

ඞHope this helps u because i got dis question from Khan Academyඞ

4 0
3 years ago
The number 1,645.6 expressed in scientific notation equals
grin007 [14]

Answer:

1.6456 * 10^{3}

Step-by-step explanation:

<u>Step 1:  Convert to Scientific Notation</u>

<u />1645.6 is in standard notation

1.6456 * 10^{3} is in scientific notation

Answer:  1.6456 * 10^{3}

8 0
3 years ago
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