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3 years ago

Can someone help me please...

Mathematics

1 answer:

Phoenix [80]3 years ago

8 0

Answer:

B. (Graph Z)

Step-by-step explanation:

A nonlinear rate is always expressed as a curve on a graph.

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Which answer describes the graph of the system of equations?<br>

Pavlova-9 [17]

Answer:

D, the lines coincide.

Step-by-step explanation:

isolate the y so theres no 2y, only y:

2y = 8 - 2x (divide both sides by 2)

y = 4 - x

The lines are the same line, so while they are plural, they also coincide, as one lies on top of the other.

Hope this helps :) Brainliest??

7 0

3 years ago

The triangle shown below has an area of 16 units^2

AleksandrR [38]

Answer:

Step-by-step explanation:

base x height / 2 = the area

4 x h / 2 = 16

h = 8

so x is 8

4 0

3 years ago

Read 2 more answers

For numbers 11-15: How much time is there between: 11. 3:00 pm and 4:00 pm? 12. 5:00 pm and 8:00 pm? 13. 4:30 pm and 5:00 pm? 14

slavikrds [6]

Answer:

11 ) 1 Hour

12 ) 3 Hours

13 ) 30 Minutes

14 ) 45 Minutes

15 ) 1 Hour and 15 Minutes

Step-by-step explanation:

3 0

3 years ago

The value of 8 in 8,596 is how many times the value of 8 in 975?

natulia [17]

8 divided by 8,586 = 1,119 Times

in 975, it's 121 times.

If I did not misunderstand your question.

7 0

4 years ago

A small town has 2000 inhabitants. At 8 AM, 160 people have heard a rumor. By noon half the town has heard it. At what time will

QveST [7]

Answer:

3:36 PM

Step-by-step explanation:

Let fraction (y) of the people that heard the rumor , the differential equation that is satisfied by the by y is,

$\frac{dy}{dt} = ky(1-y)$

Solving the differential equation,

$y(t) = \frac{y_{o}}{[y_{o} + (1 + y_{o})e^{-kt}]}$

The total number of inhabitants of the town = 2000

The number of people that heard the rumor = 160

At 8 AM, let t = 0,

$y(0) = \frac{160}{2000}$

= 0.08

By noon, half of the town as heard the rumor.

Then,

$y(4) = \frac{1}{2}$

Therefore,

$\frac{1}{2} = \frac{0.08}{[0.08 + (1 - 0.08)e^{-4k}]}$

$\frac{0.08}{[0.08 + 0.92e^{-4k}]} = \frac{1}{2}$

$0.08 + 0.92e^{-4k} = 0.16$

$0.92e^{-4k} = 0.16 - 0.08$

$0.92e^{-4k} = 0.08$

$e^{-4k} = \frac {0.08}{0.92}$

$k = - \frac{1}{4} In(\frac {0.08}{0.92})$

k ≈ 0.06106

Calculating time, t when y(t) = 90%

⇒ y(t) = 0.9

$\frac{0.08}{[0.08 + 0.92e^{-0.06106t}]} =0.9$

$0.08 + 0.92e^{-0.06106t} = \frac {0.9}{0.08}$

$0.08 + 0.92e^{-0.06106t} = 0.089$

$0.92e^{-0.06106t} = 0.089 - 0.08$

$0.92e^{-0.06106t} = 0.0089$

$t = - \frac{1}{0.06106}In (\frac{0.0089}{0.92})$

t = 7.59 hours

⇒ 7 hours 36 minutes

From 8 A.M. plus 7 hours 36 minutes = 3:36 PM

At 3:36 PM will 90% of the population have heard the rumor

7 0

3 years ago