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2 years ago

2.5(x + 4) = 5 what is the value of x

Mathematics

2 answers:

bezimeni [28]2 years ago

5 0

Answer: -2

Step-by-step explanation:

castortr0y [4]2 years ago

4 0

Answer:

-2

Step-by-step explanation:

2.5(x+4)=5

2.5(x)+2.5(4)=5

2.5(x)=10

2.5(x)+10-10=5-10

2.5(x)=-5

2.5x/2.5 = -5/2.5

-2

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A shipping company selects 75 random packages to check their weight.It finds that 3 packages were weighed incorrectly. How many

Misha Larkins [42]

Answer: 120 Packages

Step-by-step explanation:

Given

75 random packages are check

3 package is found faulty

So, the percentage of error is

$\Rightarrow \dfrac{3}{75}\times 100=4\%$

i.e. 4% packages is faulty

For 3000 sample, expected faulty packages are

$\Rightarrow 3000\times \dfrac{4}{100}=120\ \text{Packages}$

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2 years ago

Thetime(inhours)requiredtorepairamachineis an exponentially distributed random variable with parameter λ = 1 . What is 2 (a) the

mihalych1998 [28]

Answer:

a) 0.1353

b) 0.3679

Step-by-step explanation:

Let's start by defining the random variable T.

T : ''The time (in hours) required to repair a machine''

T ~ exp (λ)

T ~ exp (1)

The probability density function for the exponential distribution is

(In the equation I replaced λ = L)

$f(x)=Le^{-Lx}$

With L > 0 and x ≥ 0

In this exercise λ = 1 ⇒

$f(x)=e^{-x}$

For a)

$P(T>2)$

$P(T>2)=1-P(T\leq 2)$

$P(T>2)=1-\int\limits^2_0 {e^{-x} } \, dx$

$P(T>2)=1-(-e^{-2}+1)$

$P(T>2)=e^{-2}=0.1353$

For b)

$P(T\geq 10/T>9)$

The event (T ≥ 10 / T > 9) is equivalent to the event T ≥ 1 so they have the same probability of occur

$P(T\geq 10/T>9)=P(T\geq 1)$

$P(T\geq 1)=1-P(T$

$P(T\geq 1)=1-(-e^{-1}+1)=e^{-1}=0.3679$

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3 years ago

Which of the following are not affected by the others outcomes

tankabanditka [31]

Whats not affected by the
others outcome

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3 years ago

Which statement best describes the function represented by the graph??

Novosadov [1.4K]

Answer:

The last one decreasing on the interval (-infinity, 0) where it becomes constant

Step-by-step explanation:

6 0

3 years ago

How do I find the value of x

juin [17]

You set (x+15) equal to 40 and solve for x.

x+15=40
-15 -15

x=25

Hope this helps!

8 0

3 years ago