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
JulijaS [17]
3 years ago
14

Y = 3x + 8 8x + 4y = 12

Mathematics
1 answer:
KIM [24]3 years ago
7 0
You substitute the given value of y into the equation
8x+4(3x+8)=12
Solve the equation for x
x= -1
Substitute the given value of x into the equation y=3x+8
y=3x (-1)+8
Solve the equation for y
y=5


Answer: (x= -1) (y= 5)
You might be interested in
Write 12.9 + 8 using words.
Anna35 [415]
Twelve point nine plus eight equals twenty point nine (12.9 + 8 = 20.9)
Hope this helped :)
7 0
3 years ago
Which of the following statements is the only<br> sentence that is error-free?
Ray Of Light [21]
I don’t really know what the answer is
5 0
2 years ago
CAN SOMEBODY HELP ME WITH THESE QUESTION 4 AND 5 PLZZZZZZZZ I NEED YOU HELP I WILL GIVE BRAINLY BUT PLZZZZZ ANSWER THE QUESTIONS
frozen [14]

Answer:

Step-by-step explanation:

welp since there is no question at least i gets free points

3 0
3 years ago
A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
<span>

Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
5 0
3 years ago
Yolanda's club has 50 members. It's rules require that 60% of them must be present for any vote. At least how many members must
HACTEHA [7]
If you do 60% then you put the percent two times over the the left so 0.60 then you would do 0.60 times 50 so that would be 30. 30 of the members must vote. Hopefully that helped?
7 0
3 years ago
Other questions:
  • In 2012, five U.S postal stamps cost $2.20. how much did seven stamps cost? answer please
    14·2 answers
  • As a result of the partition of India in 1947, Hindus migrated to the northern provinces, where thousands perished from starvati
    10·2 answers
  • it takes a hospital dietitian 15 minutes to drive from home to the hospital, a distance of 14 miles, what is the dietitian's rat
    15·1 answer
  • The lengths of text messages are normally distributed with a population standard deviation of 3 characters and an unknown popula
    9·1 answer
  • The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate o
    5·1 answer
  • Use the equation of the water level of the river represented by the equation y=-4x + 170, where x represents the
    5·2 answers
  • Peter buys a small wind turbine for use on his farm. It generates 13,000 kWh of electricity in the first year. He uses 7,570 kWh
    13·1 answer
  • Which equation represents a line that is parallel to the line y = - 4x +5?
    13·2 answers
  • 3. Calculer le volume d'un cylindre de rayon 4 cm et de hauteur 15 cm ( valeur exacte puis arrondie au centième
    11·2 answers
  • What is the area of the base?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!