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
marissa [1.9K]
3 years ago
12

Help. Evaluate the following expression. 1 x (-4 + (-8))

Mathematics
2 answers:
JulijaS [17]3 years ago
8 0

Answer:

-12

Step-by-step explanation:

-4+ -8= -12

anything times 1 is its self so that's ur answer

soldi70 [24.7K]3 years ago
5 0

Answer:

-12x

Step-by-step explanation:

You might be interested in
This is worth 30 points
Mama L [17]

Answer:

There's 3 questions which one do I answer?

Step-by-step explanation:

6 0
3 years ago
Assume that you assign the following subjective probabilities for your final grade in your econometrics course (the standard GPA
rodikova [14]

Answer:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

C. 2.78

Step-by-step explanation:

For this case we have the following probabability distribution function given:

Score         P(X)

A= 4.0       0.2

B= 3.0       0.5

C= 2.0       0.2

D= 1.0        0.08

F= 0.0       0.02

______________

Total          1.00

The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.

If we use the definition of expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And if we replace the values that we have we got:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

C. 2.78

3 0
3 years ago
hank is working in a silver mine 10ft below the surface. he descends until he reaches a point 57ft below the surface. how many f
Dmitry [639]

Depth of Hank descends = The point he reached - the point where he worked initially

                                          = 57 - 10

                                          = 47 ft

Hence, Hank descends 47 ft.

3 0
2 years ago
In the equation y=x2 , which of the following explains the unit rate?
muminat
The only logical answer is, 2 because the unit rate is value of y when x=1.

y=(1)2
y=2.

As I stated in the same question, the "Unit Rate" is not hard, it's just slope. They are trying to trick you by saying "unit rate". Your unit rate is x2.
3 0
3 years ago
A real estate agent has 1212 properties that she shows. She feels that there is a 50P% chance of selling any one property during
forsale [732]

Answer:

0.6127 = 61.27% probability of selling no more than 6 properties in one week.

Step-by-step explanation:

For each property, there are only two possible outcomes. Either it is sold, or it is not. The probability of a property being sold is independent of any other property. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

And p is the probability of X happening.

12 properties

This means that n = 12

She feels that there is a 50% chance of selling any one property during a week.

This means that p = 0.5

Compute the probability of selling no more than 6 properties in one week.

This is:

P(X \leq 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5) + P(X = 6)

In which

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

P(X = 0) = C_{12,0}.(0.5)^{0}.(0.5)^{12} = 0.0002

P(X = 1) = C_{12,1}.(0.5)^{1}.(0.5)^{11} = 0.0029

P(X = 2) = C_{12,2}.(0.5)^{2}.(0.5)^{10} = 0.0161

P(X = 3) = C_{12,3}.(0.5)^{3}.(0.5)^{9} = 0.0537

P(X = 4) = C_{12,4}.(0.5)^{4}.(0.5)^{8} = 0.1208

P(X = 5) = C_{12,5}.(0.5)^{5}.(0.5)^{7} = 0.1934

P(X = 6) = C_{12,6}.(0.5)^{6}.(0.5)^{6} = 0.2256

P(X \leq 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5) + P(X = 6) = 0.0002 + 0.0029 + 0.0161 + 0.0537 + 0.1208 + 0.1934 + 0.2256 = 0.6127

0.6127 = 61.27% probability of selling no more than 6 properties in one week.

6 0
2 years ago
Other questions:
  • Draymond green averaged 5.1 field goal shot attempts per game. Stephen curry averaged 10.2 field goal shot attempts per game. Ho
    5·1 answer
  • WILLL GIVE A BRAINLEST FOR RIGHT ANSWER
    7·2 answers
  • Hi people of earth... I have a question here...
    12·2 answers
  • Find the real numbers x and y that make the equation true.<br> -3 + yi = x + 6i
    6·1 answer
  • Suppose the amount of exports of textile machinery from Italy to the rest of the world equals 60 billion tons. The amount of imp
    7·1 answer
  • PLEASE PLEASE PLEASE HELP!! Explanations on how to set it up would be great!
    14·2 answers
  • Help 911
    8·2 answers
  • 4/-2 flipped over the x axis
    9·1 answer
  • Han has to build the figure below, which will serve as a counterweight, for his robotics project. Find the VOLUME of the finishe
    10·1 answer
  • In triangle UVW, the measure of angle W=90°, the measure of angle U=15°, and VW=81 feet, Find the length of WU to the nearest te
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!