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kompoz [17]
2 years ago
7

Which does not represent an equivalent expression to 8x +4

Mathematics
1 answer:
sineoko [7]2 years ago
4 0

Answer:

d) 2x(4x + 2)

Step-by-step explanation:

a) 4(2x + 1) = 8x + 4

b) 1/2(16x + 8) = 8x + 4

c) 2(4x + 2) = 8x + 4

d) 2x(4x + 2) = 8x² + 4x

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There are 72 girls playing in the playground 3/7 of the children in the playground are boys how many children are playing in the
kogti [31]
Fraction of girls =  1 - 3/7 = 4/7 

4/7 is equivalent to 72 girls
1/7  ..  ..  .............   72 / 4 = 18
Total number of children = 7/7   = 18*7 =  126 Answer
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3 years ago
Nita bought some games for her grandchildren for $42.50 each. If she
amid [387]

Answer:

8

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3 years ago
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Suppose taxi fare from Logan Airport to downtown Boston is known to be normally distributed with a standard deviation of $2.50.
Mariulka [41]

Answer:

95% Confidence interval for taxi fare:  ($20.5,$24.2)

Step-by-step explanation:

We are given the following data set: for fares:

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Mean =\displaystyle\frac{156.5}{7} = 22.35

95% Confidence interval:

\bar{x} \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

22.35 \pm 1.96(\frac{2.5}{\sqrt{7}} ) = 22.35 \pm 1.85 = (20.5,24.2)

6 0
3 years ago
Make x the subject of the formula (help again)<br>I'm really bad at these <br><br>xk-w=y ​
7nadin3 [17]

Answer:

x =  ​(y+w)/k

Step-by-step explanation:

xk-w=y ​

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xk-w+w=y+w

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5 0
3 years ago
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What number is 44% of 25
AysviL [449]
44 percent of 25 is 11 to get percentage u would take 44 and divide it by a hundred and u would get .44 and then u would multiply that by 25 and u get 11

8 0
3 years ago
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