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Dmitrij [34]
4 years ago
13

Which expresion is equivalent to 30(1/2x-2)+40(3/4y-4)

Mathematics
1 answer:
Dafna11 [192]4 years ago
6 0

Answer:

15x +30y -220

steps:

30(1/2x-2)+40(3/4y-4)

= 15x-60 +30y-160

= 15x +30y -220

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A bent coin has probability 0.55 of landing heads up. What is the probability that two tosses of the coin will both result in he
telo118 [61]

Answer:

Required probability is 0.3025.

Step-by-step explanation:

Given that probability of landing heads up in a toss of bent coin = 0.55

Then probability of getting head in 1st toss = 0.55

2nd toss is independent of the first toss.

Then probability of getting head in 2nd toss = 0.55

Hence probability of getting head in two tosses of the coin = (0.55)(0.55) =0.3025

Hence required probability is 0.3025.

6 0
3 years ago
Read 2 more answers
What is the value of the 30th percentile for the data set 6283, 5700, 6381, 6274, 5700, 5896, 5972, 6075, 5993, 5581?
sineoko [7]

To solve this problem, we should remember that the percentile rank of a single value is the rank of that value in the series of data set when that data set is arranged in ascending order.

Therefore arranging the data set, gives the sequence:

5581, 5700, 5700, 5896, 5972, 5993, 6075, 6274, 6283, 6381

<span>Since we are to find the 30th percentile (30 %) and there are a total of 10 values, therefore the 30th percentile is:</span>

10 * 30% = 3

<span>This means we look for the 3rd number in the ordered sequence.</span>

<span>
</span>

<span>Answer: 5700 is the 30th percentile of the series</span>

7 0
4 years ago
Read 2 more answers
What is an equation of the line that passes through the point (5, 1) and is parallel to
Andreyy89

Answer:

Step-by-step explanation:

y = -x + 9

y - 1 = -(x - 5)

y - 1 = -x + 5

y = -x + 6

7 0
3 years ago
I’m confused on this problem
Mila [183]

Answer:

y=5x-7

-3x-2y=-12

Step-by-step explanation:

-3x-2(5x-7)=-12

-3x-10x+14=-12

-13x+14=-12

-13x=-26

y=5x-7+5x2-7=10-7=3

3 0
4 years ago
Please help me solve this
seropon [69]

9514 1404 393

Answer:

  103°

Step-by-step explanation:

The law of sines tells you ...

  sin(C)/c = sin(A)/a

  sin(C) = (c/a)sin(A)

  C = arcsin(c/a·sin(A)) = arcsin(37/19·sin(30°)) ≈ 180° -76.8° ≈ 103°

Obtuse angle C is about 103°.

5 0
3 years ago
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