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2 years ago

8

What is the solution to the equation 3/5n - 4/5 = 1/5n?

2 answers:

algol [13]2 years ago

7 0

Answer:

The answer is B

The answer is 2.

Work:

3/5n-4/5=1/5n

-Combine like terms

3/5n-4/5=1/5n

-3/5n -3/5n

-4/5=-2/5n

Divide by -2/5

-4/5=-2/5n

/ -2/5

(the 5 crosses out leaving -4/-2)

n=2 :)

Plz mark brainliest↖(^ω^)↗

antiseptic1488 [7]2 years ago

3 0

Answer: 2

Step-by-step explanation:

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An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 4.

Leno4ka [110]

Answer:

P(4 non-work-related e-mails)=0.1933

P(7 or more non-work-related e-mails)=0.1442

P(3 or less non-work-related e-mails)=0.3771

Step-by-step explanation:

A Poisson distribution is useful to measure the probability of a number of events in a given period, in this problem, receiving a non-work-related e-mail would be the event and an hour would be the period of time.

Its probability mass function is $f(k; \lambda) = P(x=k) = \frac{\lambda^k e^{-\lambda}}{k!}$ , being k the number of events and λ how many sucesses (events) are per period of time (4.3 in this case)

First, we calculate what is the probability of receiving exactly 4 e-mails:

$f(k; \lambda) =P(k=4) =\frac{4.3^4 e^{-\4.3}}{4!}=0.1933$

As k is a discrete variable, to know the joint probability of different number of events we add the probability of each value.

The probability of receiving 7 or more is the sum of P(7), P(8), ..., P(∞):

$P(k\geq 7 ) =\sum_{i=7}^{\infty}\frac{4.3^i e^{-\4.3}}{i!}=0.1442$

Last, the probability of receiving 3 or less is the sum of P(0), P(1), P(2) and P(3):

$P(k\leq3 ) =\sum_{i=0}^{3}\frac{4.3^i e^{-\4.3}}{i!}=0.3771$

3 0

2 years ago

You take the bus to work I need to arrive by nine the trip takes 25 minutes if you take 10 minutes to get to the bus stop from h

ozzi

Answer:

45 minutes in all

Step-by-step explanation:

7 0

2 years ago

If one angle of supplementary angle is 40 degrees; what is the angle measurement of the other one?

iVinArrow [24]

Answer:

140°

Step-by-step explanation:

Supplementary angles sum to 180° , thus

angle = 180° - 40° = 140° ← other angle

5 0

2 years ago

(Will give Brainliest) Explain what the graph of the function represents. Be sure to use complete sentences.

Irina-Kira [14]

Answer: $f(-735) = -\frac{2}{3}(-735) + 490 = 980$

Step-by-step explanation:

$f(x) = -\frac{2}{3} x + 490 =0$ Subtract 490 from both sides

$\frac{3}{2}* -\frac{2}{3} x = -490 *\frac{3}{2}$ Then flip $-\frac{2}{3}$ multiply both sides by $\frac{3}{2}$ to cancel out $-\frac{2}{3}$

$x= -735$ Thus giving you -735 as your $x$ .

Then you plug it back into the equation to solve.

4 0

1 year ago

Angle A and Angle B are vertical angles. If m

damaskus [11]

Answer:

∠B = 17°

Step-by-step explanation:

Vertical angles are congruent, thus

5x + 7 = x + 15 ( subtract x from both sides )

4x + 7 = 15 ( subtract 7 from both sides )

4x = 8 ( divide both sides by 4 )

x = 2

Hence

∠B = 5x + 7 = (5 × 2) + 7 = 10 + 2 = 17°

3 0

2 years ago