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fomenos
2 years ago
6

Show the working out too please in numbers, thank you.

Mathematics
2 answers:
Sergio039 [100]2 years ago
8 0
<h2><u>P</u><u>roblem:</u><u>-</u><u> </u></h2>

Solve for x

\\  - 5 =  \frac{x}{6}

<h2><u>Solution</u><u>:</u><u>-</u></h2>

<u>\\  - 5 =  \frac{x}{6}</u>

<u>\\  \mapsto - 5 \times 6 = x</u>

<u>\\ \mapsto - 30 = x</u>

<u>\\  \mapsto \: x =  - 30</u>

<h2><u>Answer</u><u>:</u><u>-</u></h2>

∴ The value of x is -30

vazorg [7]2 years ago
3 0

Hii :))

\tt \: - 5 =  \frac{x}{6}  \\   \tt \:  - 5 \times 6 = x \\  \boxed{  \tt \:  - 30 = x}

__________________

  • The correct value of x is <u>-</u><u> </u><u>3</u><u>0</u><u>.</u>

\overbrace{ \underbrace{ \sf \: \infty  \:  Carry \: on \: Learning \:  \infty }}

ᴛʜᴇᴇxᴛʀᴀᴛᴇʀᴇꜱᴛʀɪᴀʟ

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2 years ago
Batteries produced by a manufacturing company have had a life expectancy of 135 hours. Because of an improved production process
Nikolay [14]

Answer:  c. z = 1.35; Reject the null hypothesis

Step-by-step explanation:

Let \mu be the average life expectancy of its batteries.

As per given , we have

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Alternative hypothesis : H_a : \mu >135

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Test statistic : \dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

where, n= sample size

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For n=42,\ \overline{x}=140\ \&\ \sigma=24, we have

z=\dfrac{140-135}{\dfrac{24}{\sqrt{42}}}=1.35015431217\approx1.35

Critical one-tailed test value for 0.10 significance level :

z_{0.1}=1.28

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5 0
2 years ago
Y varies inversely with x. If y = -8 when x = -7, find the y when x=-4.
lora16 [44]

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xy = 56

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2 years ago
Parallel to y=2/3x+6 through (-3, 6)
Lana71 [14]

Answer:

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Plug in (-3, 6) for (x, y) in the equation.

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Final equation: y = (2/3)x + 8

7 0
3 years ago
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