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2 years ago

(3-x)(x-5) Hurry PLZ

Mathematics

1 answer:

marshall27 [118]2 years ago

3 0

Answer:

-3x^2 + 15x

Step-by-step explanation:

(3 - x) (x - 5)

=> (3x - 15) ( -x)

=> -3x^2 + 15x

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What is the solution? you can solve using elimination or substitution.

Alexxx [7]

Plug in the x+3 for y.
8x-x+3=12
7x=9
X=1.3

Then, y= -0.25

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3 years ago

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9/4 is between what two numbers

Debora [2.8K]

9/4 is between 2 and 3

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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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2 years ago

Determine the intercepts of the line.<br> y-intercept (____,____)<br> x-intercept (____,____)

bija089 [108]

Answer:

y intercept is (0 , 2.5)

x intercept is (3.5 , 0)

Step-by-step explanation:

Khan Academy is fun !!!!!!!!!!

y- intercept is where the line meets the y line l

x- intercept is where the line meets the x line ____

The y-intercept is 2.5

The x-intercept is 3.5

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2 years ago

A shopper bought a 12-pound bag of oranges for 18.75. What is the unit price per ounce?

noname [10]

Answer:

About $0.10 per ounce

Step-by-step explanation:

12 pound costs $18.75. Lets find the cost per pound first:

Cost Per Pound = $\frac{18.75}{12}=1.5625$

We know, there are 16 ounces in 1 pound.

We know 1 pound costs 1.5625

To find cost per ounce, we have to divide this by 16.

So,

Cost Per Ounce = $\frac{1.5625}{16}=0.097$

Rounded to nearest cent, that would be 10 cents per ounce

5 0

3 years ago