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gulaghasi [49]
3 years ago
6

A woman buys 4metres of cloth costing $40 per metre, and 6metres of cloth costing $45 per metre. How much will she pay altogethe

r?​
Mathematics
2 answers:
Tom [10]3 years ago
5 0

Answer:

$430

Step-by-step explanation:

Total cost is simply:

40 × 4 + 45 × 6

= 160 + 270 = $430

murzikaleks [220]3 years ago
3 0

Answer:$430

Step-by-step explanation: 40*4 for the first amount of cloth, 6*45 for the second amount. Add those two together and you get 430

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Romashka-Z-Leto [24]

Answer:

a

\= x  =  82

b

s =  9.64

Step-by-step explanation:

From the question we are told that

    The data is  87  91  86  82  72  91   60  77  80  79  83  96

Generally the point estimate for the mean is mathematically represented as

    \= x  =  \frac{\sum  x_i }{n}

=>  \= x  =  \frac{87 +91 + 86 + \cdots  + 96}{12}

=>    \= x  =  82

Generally the point estimate for the standard deviation  is mathematically represented as

      s =  \sqrt{\frac{ \sum ( x_i  - \= x )^2 }{ n -1 } }

=>     s =  \sqrt{\frac{ ( 87 - 82  )^2 +( 91 - 82  )^2 + \cdots + ( 96 - 82  )^2  }{ 12 -1 } }

=>     s =  9.64

8 0
3 years ago
What is x in this problem
o-na [289]

Answer:

total \: angle \: for \: a \: triangle = 180 \\ then \:  \\ 3x + 11 + 9x - 16 + 7x - 5 = 180 \\ 19x - 10 = 180 \\ 19x = 180 + 10 \\ 19x = 190 \\ x =  \frac{190}{19}  = 10 \\ thank \: yo

6 0
2 years ago
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mars1129 [50]
15. In a similar figure the sides are proportional. So you have to say which ratio of sides is also proportional or which sides are equal to the fraction 44/35.2

it would be c because :
44/35.2 = 132/105.6

16. same thing with similar triangles. if the length of sides are similar then so is perimeter. So so we find the ratio of the side lengths. We we know sq is 6 and qt is 24. So st is 30. So so the line st and sq are matching and similar so we compare their lengths and get a ratio
sq * x = st
6 * x = 30
x = 5

So so the perimeter is 5 times more than small triangle so
5 * 20 = 100

17.similar side is 0.5 and 3.6 so ratio is 3.6/0.5. we know she is 1.8 talk so
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3 years ago
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olga55 [171]

Answer:

7

Step-by-step explanation:

form a proportion

12/2=42/x

cross multiply

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3 years ago
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