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Furkat [3]
3 years ago
6

Find the solution of the system of equations. 8x-3y=2 -8x-5y=46

Mathematics
2 answers:
ivolga24 [154]3 years ago
7 0

Answer:

  (x, y) = (-2, -6)

Step-by-step explanation:

The coefficients of x are opposites, so the variable x can be eliminated by adding the equations together:

  (8x -3y) +(-8x -5y) = (2) +(48)

  -8y = 48 . . . . . simplify

  y = -6 . . . . . . . divide by -8

Use this value in either equation to find x.

  8x -3(-6) = 2

  8x = -16 . . . . . . subtract 18

  x = -2 . . . . . . .  divide by 8

The solution to the system of equations is (x, y) = (-2, -6).

_____

I like a graphing calculator for verifying results.

Bingel [31]3 years ago
4 0

Answer:

use elimination

8x-3y=2

-8x-5y=46

8x cancel out

-5y-3y= -8y= 48

48/-8= -6y

Step-by-step explanation:

ANSWER= -6y

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Put the following equation of a line into slope-intercept form, simplifying all fractions. 5x+6y=42
Sever21 [200]

Answer:

y=-\frac{5}{6} + 7

Step-by-step explanation:

Slope-intercept formula requires us to isolate the y variable. We can do this in just a couple of steps.

1) Move 5x from the left to the right side by subtracting 5x from both sides. This cancels out the 5x on the left side, and remember, what we do to one side we must do to the other to keep the equation balanced.

6y=-5x+42

2) Divide both sides by 6. Again, we are cancelling out the 6 on the left but we must also divide on the right. This would mean dividing -5 and 42 by 6 to get:

y=-\frac{5}{6} + 7

4 0
1 year ago
if you roll a fair 6-sided die 9 times, what is the probability that at least 2 of the rolls come up as a 3 or a 4?
Kay [80]

Using the binomial distribution, it is found that there is a 0.857 = 85.7% probability that at least 2 of the rolls come up as a 3 or a 4.

For each die, there are only two possible outcomes, either a 3 or a 4 is rolled, or it is not. The result of a roll is independent of any other roll, hence, the <em>binomial distribution</em> is used to solve this question.

Binomial probability distribution

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

In this problem:

  • There are 9 rolls, hence n = 9.
  • Of the six sides, 2 are 3 or 4, hence p = \frac{2}{6} = 0.3333

The desired probability is:

P(X \geq 2) = 1 - P(X < 2)

In which:

P(X < 2) = P(X = 0) + P(X = 1)

Then

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{9,0}.(0.3333)^{0}.(0.6667)^{9} = 0.026

P(X = 1) = C_{9,1}.(0.3333)^{1}.(0.6667)^{8} = 0.117

Then:

P(X < 2) = P(X = 0) + P(X = 1) = 0.026 + 0.117 = 0.143

P(X \geq 2) = 1 - P(X < 2) = 1 - 0.143 = 0.857

0.857 = 85.7% probability that at least 2 of the rolls come up as a 3 or a 4.

For more on the binomial distribution, you can check brainly.com/question/24863377

7 0
2 years ago
A triangle has side lengths 10, 16, and 11. is the triangle actue, obtuse, or right?
qwelly [4]

Answer:

Obtuse

Step-by-step explanation:

a^2 + b^2 = c^2

10^2 + 11^2 = 16^2

100 + 121 = 256

221 = 256

221 < 256

6 0
2 years ago
Which of the following equations has the same solution as the equation 2x+6=32
Sergeu [11.5K]

Answer: x=13

Step-by-step explanation: Move all terms that don't contain x to the right side and solve.

Hope this helps you out! ☺

6 0
3 years ago
What is the solution to this equation?<br><br> 7- 3√2-x=12
dedylja [7]

Answer:

x=-5-3\sqrt{2}

It cannot be more simplified.

4 0
3 years ago
Read 2 more answers
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