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hjlf
3 years ago
10

25 POINTS! Match each expression on the left to its equivalent expression on the right. Write the letter (A,B,C) next to the num

ber that it matches up with.

Mathematics
2 answers:
LenKa [72]3 years ago
6 0
7. A


8. C


9. B




I hope that answer the question
Nat2105 [25]3 years ago
3 0

Answer:

7) C

8) A

9) B

Step-by-step explanation:

7)

\frac{1}{3}x +\frac{1}{4} -\frac{2}{3} x=-\frac{1}{3} x+\frac{1}{4}

8)

\frac{1}{3}x +\frac{1}{4} +\frac{2}{3}x=x+\frac{1}{4}

9)

\frac{2}{3} +\frac{3}{4}x -\frac{1}{3} =\frac{3}{4} x+\frac{1}{3}

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The average mark of candidates in an aptitude test was 128.5 with a standard deviation of 8.2.Three scores extracted from the te
Luba_88 [7]

Answer:

102

Step-by-step explanation:

We have the mean (m) 128.5 and the standard deviation (sd) 8.2, we must calculate the value of z for each one and determine whether or not it is an outlier:

z = (x - m) / sd

In the first case x = 148:

z = (148 - 128.5) /8.2

z = 2.37

In the second case x = 102:

z = (102 - 128.5) /8.2

z = -3.23

In the first case x = 152:

z = (152 - 128.5) /8.2

z = 2.86

The value of this is usually between -3 and 3, therefore when x is 102 it goes outside the range of the value of z, which means that this is the outlier.

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3 years ago
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pashok25 [27]

Step-by-step explanation:

If we let the width be w, then the length is w+3.5.

This means that w(w+3.5)=11

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(2w+11)(w-2)=0

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This means that w=2, and thus the length is 2+3.5=5.5

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Solve the simultaneous equations.<br>3x-y=1, 2x + 5y = 41​
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Y=3x-1, Y=-2/5x + 41/5
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3 years ago
What is 30% of 70? Please help.
garik1379 [7]
Hi lovely,

The answer you're looking for is 21.
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Answer:

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