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vodka [1.7K]
3 years ago
7

If 32 yd of knitted material is made from 6 lb of yarn, how many yards will be made from 55 lb?

Mathematics
2 answers:
Airida [17]3 years ago
5 0
I think the answer is 330 yds
Marrrta [24]3 years ago
3 0

1 lb makes 32⁄6 yd (unit yardage).  

55 × 32⁄6 = 2931⁄3 yd

1 cu yd = 27 cu ft

67.5 cu ft = 67.5⁄27 = 2.5 cu yd

25 + 30 + 18 + 35 = 108 min  

108 ÷ 60 = 1 hr and 48 min

Time = Distance ÷ Rate

210 ÷ 100 = 2.1 hr, or 2 hr and 6 min

5.4 lb × 0.4536 = 2.45 kg

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divide both sides by 16
x = -5/2 or -2.5
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How many ways can a president, vice-president, secretary, and treasurer be chosen from a club with 8 members?
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_8C_4=\dfrac{8!}{4!4!}=\dfrac{5\cdot6\cdot7\cdot8}{2\cdot3\cdot4}=70

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3 years ago
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A sample of 4 different calculators is randomly selected from a group containing 18 that are defective and 35 that have no defec
Sphinxa [80]
<span>1.

P(</span>at least one of the calculators is defective)= 

1- P(none of the selected calculators is defective).

2.

P(none of the selected calculators is defective)

           =n(ways of selecting 4 non-defective calculators)/n(total selections of 4)

3.

selecting 4 non-defective calculators can be done in C(35, 4) many ways, 

where  C(35, 4)= \frac{35!}{4!31!}= \frac{35*34*33*32*31!}{4!*31!}=  \frac{35*34*33*32}{4!}=  \frac{35*34*33*32}{4*3*2*1}=  52,360

while, the total number selections of 4 out of 18+35=53 calculators can be done in C(53, 4) many ways,

C(53, 4)= \frac{53!}{4!*49!}= \frac{53*52*51*50}{4*3*2*1}= 292,825

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5. P(at least one of the calculators is defective)= 

1- P(none of the selected calculators is defective)=1-0.18=0.82



Answer:0.82
7 0
3 years ago
PART 1
Harrizon [31]

Answer:

Step-by-step explanation:

Part 1 is B and part 2 is A

5 0
3 years ago
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