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
Ludmilka [50]
2 years ago
12

Solve the system of equations. Use any method you prefer.

Mathematics
1 answer:
ira [324]2 years ago
3 0

Step-by-step explanation:

-2x-2x+5=-1-2x-2x+5=1

You might be interested in
Please please help I will give brainliest
butalik [34]

Answer:

67

4*4*4=64

64+3=

67

8 0
2 years ago
Read 2 more answers
A telemarketer is successful at getting people to donate money for her organization in 55% of all calls she makes. She must get
Tems11 [23]
An interesting twist to a binomial distribution problem.

Given:
p=55%=0.55 for probability of success in solicitation
x=4=number of successful solicitations
n=number of calls to be made
P(x,n,p)>=89.9%=0.899  (from context, it is >= and not =, which is almost impossible)

From context of question, all calls are assumed independent, with constant probability of success, so binomial distribution is applicable.

The number of successes, x, is then given by
P(x)=C(n,x)p^x(1-p)^{n-x}where
p=probability of success
n=number of trials
x=number of successesC(n,x)=\frac{n!}{x!(n-x)!}

Here we need n such that
P(x,n,p)>=0.899
given
x>=4, p=0.55, which means we need to find

Method 1: if a cumulative binomial distribution table is available, we can look up n=9,10,11 and find
P(x>=4,9,0.55)=0.834
P(x>=4,10,0.55)=0.898
P(x>=4,11,0.55)=0.939
So she must make (at least) 11 calls to make sure the probability of meeting her quota is 89.9% or more.

Method 2: using technology.
Similar to method 1, we can look up the probabilities directly, for n=9,10,11
P(x>=4,9,0.55)=0.834178
P(x>=4,10,0.55)=0.8980051
P(x>=4,11,0.55)=0.9390368

Method 3: using simple calculator
Here we need to calculate the probabilities for each value of n=10,11 and sum the probabilities of FAILURE S=P(0,n,0.55)+P(1,n,0.55)+P(2,n,0.55)+P(3,n,0.55)
so that the probability of success is 1-S.
For n=10,
P(0,10,0.55)=0.000341
P(1,10,0.55)=0.004162
P(2,10,0.55)=0.022890
P(3,10,0.55)=0.074603
So that
S=0.000341+0.004162+0.022890+0.074603
=0.101995
and Probability of getting 4 successes (or more) 
=1-S
=0.898005, missing target by 0.1%

So she will have to make 11 phone calls, bring up the probability to 93.9%.  The work is similar to that of n=10.
8 0
3 years ago
I need help in less than 20 mins what is 19 times 36000 divided by 8 times 2?whoever help sub to this clipz_content on yt and ge
Aleksandr [31]

Answer:

I pretty sure the answer is 171,000 . but if i'm wrong someone can correct me

Step-by-step explanation:

4 0
3 years ago
Jessica gets her favorite shade of purple by mixing 1/3 cup of blue with 1/2 of red. How many of blue and red paint does Jessica
Vitek1552 [10]

Answer:

8 cup of blue

12 cup of red

Step-by-step explanation:

The first thing is to calculate how much black paint is produced, assuming that the volumes add up, we have to:

1/2 + 1/3 = 5/6

5/6 cup of paint is produced, I want to know how much I need to produce 20 cups, I divide the value I want by the ideal value, that is, 5/6 and thus I obtain the factor that I require:

20 / (5/6) = 24

Now I multiply by 24 each quantity of blue and red paint

1/2 * 24 = 12

1/3 * 24 = 8

Which means you need 12 cups of red paint and 8 cups of blue paint

8 0
3 years ago
Find the slope and y- intercept of x=-4
klemol [59]

Answer:

By definition, the slope of a vertical line is undefined. Because the value of x is always equal to 4 it is never equal to 0 therefore there is no y-intercept.

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Please help! Correct answers only please!
    7·1 answer
  • G (x)=x-3 and h(x)= square root of x, find(g o h) (25)
    5·1 answer
  • Pleaseeeee helpppp!!!
    5·1 answer
  • The length of the sofa in justin house is 89 inches what is the metric equivalent in centimeters
    5·2 answers
  • On first down, a football team had a loss of 8 yards. After two downs, the team had an overall gain of 20 yards. How many yards
    11·1 answer
  • What is a name for a marked angle ? Answers to choose from :
    7·2 answers
  • 2sin²(x)-5cos(x)+1=0
    15·1 answer
  • Find a solution to 3cos(θ)=−0.862 in radians
    13·1 answer
  • Is -10 bigger than -4???
    6·2 answers
  • Light bulbs manufactured at a certain factory have a 3% probability of being defective. what is the probability that 5 out of a
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!