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3 years ago

Solve negative 5 over 2, the whole multiplied by x minus 5 equals negative 55.

Mathematics

2 answers:

jasenka [17]3 years ago

8 0

Answer:

Option C.

Step-by-step explanation:

The given equation is

$-\dfrac{5}{2}(x)-5=-55$

We need to find the value of x.

Add 5 on both sides.

$-\dfrac{5}{2}(x)-5+5=-55+5$

$-\dfrac{5}{2}(x)=-50$

Multiply both sides by 2.

$-5x=-100$

Divide both sides by -5.

$x=\dfrac{-100}{-5}$

$x=20$

Therefore, the correct option is C.

astraxan [27]3 years ago

5 0

Answer:

-24

Step-by-step explanation:

$- \frac{5}{2} x \: - 5 = 55$

Multiply through by the denominator (that is, 2)

$= 2 \times ( - \frac{5}{2} x) \: - 5(2) = 55(2)$

$= - 5x - 10 = 110$

Collect like terms

$- 5x \: = 110 +10$

$- 5x = 120$

Divide through by - 5x

$\frac{ - 5x}{ - 5} = \frac{120}{ - 5}$

$x = - 24$

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3 years ago

In order to justify this claim for the Ferengi a sample of 16 coils is taken. For this sample set, the mean warp phase flux is f

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Answer:

The responses to these question can be defined as follows:

Step-by-step explanation:

$n = 16\\\\ \bar{x}= 73.7\\\\\sigma = 12\\\\a = 0.05\ or\ a = 0.10\\\\H_{o} \ : \mu = 68\\\\H_{a} \ : \mu \neq 68\\\\a = 0.05\\\\$

critical values $=\pm t0.025,15 = \pm 2.131\\\\$

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$(n-1) = 15^{\circ}\\\\$

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P - value is greater than the level of significance a= 0.05

Null hypothesis we don't reject. At a 95% level, the claim is justified.

$t_a = 1.90\\\\ df = 15\\\\ a = 0.10\\\\p-value = 076831\\\\$

P - value below the meaning level a = 0.10, we reject the hypothesis null. At a level of 90% the claim is not justified.

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