2 years ago

Solve for d: 7d = –35

Mathematics

1 answer:

34kurt2 years ago

5 0

7d = - 35
d = - 5

anything 2 ask please pm me

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If a and b are rational numbers and 5 +2 root 3/7+4 root3=a-b root 3;then a and b=

Usimov [2.4K]

Answer:

$\bold{a=5\,,\quad b=-4\frac27}$

Step-by-step explanation:

$5+\frac{2\sqrt3}7+4\sqrt3=5+\frac27\sqrt3+4\sqrt3=5+4\frac27\sqrt3=5-(-4\frac27)\sqrt3$

6 0

2 years ago

Help plz I will give brainliest

larisa86 [58]

Answer:

180 Minutes or 3 Hours

Step-by-step explanation:

25 X 7 is 175

175 rounded by the nearest tenth is 180

180 Minutes.

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2 years ago

Jerry took a sample of 4 employees in his office and observed how many hours they each worked one day.

Illusion [34]

The error in Jerry's calculation is 4.84

The number of employees, N = 4

The mean is calculated as:

$\mu = \frac{10+2+4+8}{4} \\\mu = \frac{24}{4} \\\mu = 6$

The formula for the standard deviation is:

$SD =\sqrt{\frac{\sum{(x-\mu)^2}}{N} }$

This can be further calculated as:

$SD = \sqrt{\frac{(10-6)^2+(2-6)^2+(4-6)^2+(8-6)^2}{4} }\\\\SD = \sqrt{\frac{4^2+(-4)^2+(-2)^2+(2)^2}{4} } \\\\SD = \sqrt{\frac{16+16+4+4}{4} } \\\\SD = \sqrt{\frac{40}{4} } \\\\SD = \sqrt{10} \\\\SD = 3.16$

Jerry thinks the Standard Deviation = 8

The true Standard Deviation = 3.16

Error = |True value - Measured value|

Error = |3.16 - 8|

Error = 4.84

Learn more here: brainly.com/question/18562832

3 0

1 year ago

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The sum of the angles of a triangle is 180°. If one angle of a triangle measures x and the second

denis23 [38]

Answer:

-5x+173

Step-by-step explanation:

x+4x+7 (sum of the 2 angles that you know)

5x+7

180-5x+7

-5x+173

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1 year ago

-3(8x + 4) + 1/2 (6x - 24)

julsineya [31]

-3(8x + 4) + 1/2 (6x - 24)

-21x - 24

6 0

2 years ago