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3 years ago

Y = – 3

Mathematics

2 answers:

KonstantinChe [14]3 years ago

6 0

The best approximation for the solution to this system of equations is (-2.2,-3)

Option C is correct.

Step-by-step explanation:

Solving the system of equations to get the exact value of x:

$y = -3\\y = x-0.8$

Let

$y = -3\,\,eq(1)\\y = x-0.8\,\,eq(2)$

Putting value of y from eq(1) into eq(2)

$-3=x-0.8$

$x=-3+0.8$

$x=-2.2$

So, Value of x is -2.2

The best approximation for the solution to this system of equations is:

x=-2.2 and y = -3

(-2.2,-3)

Option C is correct.

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

Eduardwww [97]3 years ago

4 0

Answer:

C:(-2.2,-3)

Hope this helps!!

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Easy but i'm confused yikes. (picture attached)

kirill115 [55]

Answer:

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Step-by-step explanation:

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3 years ago

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It is an unfair coin with unknown probability of head and tail. Can you generate even odds using this coin?

Vladimir79 [104]

Answer:

Yes, it can be generated if $p = \frac{n}{n+1}$ , where n is a positive even integer.

Step-by-step explanation:

An odds for an event, is the probability or chance that this event will occur, divided by the probability that it will not occur.

Assume that the probability of getting tail when throwing the coin is $p$ , therefore, the probability of getting a head is $(1-p)$ and the odds for the event of getting tail is $\frac{p}{1-p}$ .

If $k$ is a positive integer, and we assume that the odds of getting a tail are even, then:

$\frac{p}{1-p} = 2k$

$p = 2k - 2kp$

$p = \frac{2k}{2k+1}$

Conclusion: if $p = \frac{2k}{2k+1}$ , for some positive integer $k$ , even odds are generated. For example: $p = 2/3, 4/5, 6/7, ..$ .

6 0

3 years ago

Two airplanes are flying in the air at the same height: airplane a is flying east at 250 mi/h and airplane b is flying north at

Marta_Voda [28]

If the airport is located at the origin, for units of miles and hours, we can write the equations of position for airplanes "a" and "b" in rectangular coordinates as
a = (-30 +250t, 0)
b = (0, -40 +300t)

The distance between these (moving) points can be computed in the usual way using the Pythagorean theorem.
d = √((-30 +250t - 0)² +(0 - (-40 +300t))²)
d = √(2500 -39000t +152500t²)

Then the rate of change of d is the derivative of this.
d'(t) = (-19500 +152500t)/√(2500 -39000t +152500t²)

At the present time (t=0), the rate of change of distance between the planes is
d'(0) = -19500/√2500 = -390

The distance between the planes is decreasing at 390 mi/h.

3 0

3 years ago

What is the solution to log Subscript 5 Baseline (x + 30) = 3

oee [108]

Answer:

X = -27

Step-by-step explanation:

x = 3- 30

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3 years ago

Percent Increase

anyanavicka [17]

Answer:

20% increase

Step-by-step explanation:

Percent increase = (difference) / original *100 percent

= (12-10)/10 * 100percent

= 2/10 *100 percent

= 1/5 * 100 percent

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= 20%

4 0

3 years ago