1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stiv31 [10]
3 years ago
5

What is the solution to the system of equations? 5x + 4y = 8 x - 2y = 10

Mathematics
1 answer:
romanna [79]3 years ago
4 0
Double the second equation (multiply by 2)...
2(x-2y=10)
2x-4y=20

Bring in the second equation and add the equations:
(2x-4y=20)
+ (5x+4y=8)

7x=28
x=4

Plug in x into one of the equations to get y...
(4)-2y=10
-2y=6
y=-3

(6,-3)

Make sure to follow me!
You might be interested in
What is the solution of -27 = m/9 ?<br><br>A. -243<br><br>B. -3<br><br>C. 3<br><br>D. 243​
asambeis [7]
Answer: m = -243



Explanation:

• Solve

-27 = m/9


•Multiply 9 by 27

m/9 * -27

• Result

m = -243





8 0
3 years ago
Read 2 more answers
Two identical quarter circles are cut from a rectangle as shown
ArbitrLikvidat [17]

Answer:

The quarter circle Is connect the triangle

it is Cut.

Step-by-step explanation:

Ihope makatulong

Pa follow

5 0
2 years ago
A phycologist is interested in determining the proportion of algae samples from a local rivulet that belong to a particular phyl
LuckyWell [14K]

Answer:

A sample of 16577 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

99% confidence level

So \alpha = 0.01, z is the value of Z that has a p-value of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

She wants to estimate the proportion using a 99% confidence interval with a margin of error of at most 0.01. How large a sample size would be required?

We have no estimation for the proportion, and thus we use \pi = 0.5, which is when the largest sample size will be needed.

The sample size is n for which M = 0.01. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.01 = 2.575\sqrt{\frac{0.5*0.5}{n}}

0.01\sqrt{n} = 2.575*0.5

\sqrt{n} = \frac{2.575*0.5}{0.01}

(\sqrt{n})^2 = (\frac{2.575*0.5}{0.01})^2

n = 16576.6

Rounding up:

A sample of 16577 is required.

8 0
2 years ago
Please i need help this is for tomorow
Anuta_ua [19.1K]
The slope is 100/1 and represents how much the price go up per unit manufactured.
The y-intercept represents the starting cost without any manufactures.

Please give me Brainliest Answer


7 0
3 years ago
Read 2 more answers
Let X be the number of Heads in 10 fair coin tosses. (a) Find the conditional PMF of X, given that the first two tosses both lan
inn [45]

Answer:

Follows are the solution to the given point:

Step-by-step explanation:

For option A:

In the first point let z be the number of heads which is available on the first two trails of tosses so, the equation is:

P(X=k | z=2 ) = \begin{pmatrix} 10-2\\ k-2\end{pmatrix} (\frac{1}{2})^{k-2} (\frac{1}{2})^{10-k}

                         = \begin{pmatrix} 8\\k-2\end{pmatrix} (\frac{1}{2})^{k-2} (\frac{1}{2})^{10-k} \ \ \ \ \ \ \ \ \  \ \\\\

                                                                                                       k= 2,3..........10For option B:

P(X=k | X \geq 2 ) =  \sum^{10}_{i=2}  \begin{pmatrix} 10-i\\ k-i\end{pmatrix} (\frac{1}{2})^{k-i} (\frac{1}{2})^{10-k}

                                                                                                k= 2,3, 4.........10

8 0
3 years ago
Other questions:
  • A company has two large computers. The slower computer can send all the company's email in 30 minutes. The faster computer can c
    7·1 answer
  • Someone please help these practice problems are hard
    12·1 answer
  • Item 28
    9·1 answer
  • - find the volume of this cylinder <br><br> diameter = 6 cm<br> height = 11 cm
    14·1 answer
  • Multiply 8 by g, then divide 7 by the result
    13·2 answers
  • I bad at division<br> i was good at it in 2nd grade but then i lost it
    10·1 answer
  • Here is the pic, pls solve it, I am very bad at these stuff.
    8·1 answer
  • The value of a stock in 1940 is $1.25. Its value grows by 7% each year after 1940.
    12·1 answer
  • Given (2x + 3) (3x − 2) = 0
    12·1 answer
  • Please help me understand this question, i’ve been struggling with this for 10minutes!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!