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
Debora [2.8K]
3 years ago
9

Which of the following is a complex number? 0 -7 O 2+√3 O 4 + 91

Mathematics
1 answer:
aivan3 [116]3 years ago
5 0
The second one because it has a square root symbol and the other ones are all numbers whole numbers
You might be interested in
What is the volume of the rectangular prism?
wlad13 [49]
The volume is 40
8x1x5=40
:)))))))))))))))))))))))
8 0
3 years ago
Read 2 more answers
A test preparation claims that more than​ 50% of the students who take their test prep course improve their scores by at least 1
satela [25.4K]

Answer:

Step-by-step explanation:

Corresponding scores before and after taking the course form matched pairs.

The data for the test are the differences between the scores before and after taking the course.

μd = scores before taking the course minus scores before taking the course.

a) For the null hypothesis

H0: μd ≥ 0

For the alternative hypothesis

H1: μd < 0

b) We would assume a significance level of 0.05. The​ P-value from the test is 0.65. The p value is high. It increases the possibility of accepting the null hypothesis.

Since alpha, 0.05 < than the p value, 0.65, then we would fail to reject the null hypothesis. Therefore, it does not provide enough evidence that scores after the course are greater than the scores before the course.

c) The mean difference for the sample scores is greater than or equal to zero

3 0
2 years ago
Given ABCE is a rectangle, D is the midpoint of CE<br> Prove AD =~ BD
Bas_tet [7]

Since the congruent operator is ≅ and since AD is congruent to BD, I'm going to assume that you want to prove that AD is congruent to BD.    
1. DE is equal to CD by definition since D is the midpoint of CE.  
2. AE is equal to BC since opposite sides of a rectangle are equal to each other.  
3. Angle AEC is equal to Angle BCE since all angles in a rectangle are right angles and all right angles are equal to each other.  
4. Triangles ADE and BDC are congruent to each other because we have SAS congruence for both triangles.  
5. AD is congruent to BC since they're corresponding sides of congruent triangles.
5 0
3 years ago
Help plz !! I will give you points or anything !!
pashok25 [27]

Answer:

Answer C is correct

Step-by-step explanation:

-200(3/4) = -600/4 = -150 ft

3 0
2 years ago
Samantha threw an apple out of a window from the tenth floor of her apartment building.The equation y=-16t^2+120 can be used to
Savatey [412]
If the apple is on the ground, then the height y is 0. To find t, just plug in 0 for y:
0=-16t^{2}+120
-120=-16t^{2}
t^{2} =7.5
t=2.74

So the answer is 2.74 seconds.

Note that taking the square root of 7.5, mathematically, gives you both 2.74 and -2.74. But because we know that time did not go backwards, only the positive value for t was considered.
5 0
3 years ago
Read 2 more answers
Other questions:
  • The owner of a video game store creates the expression −2x2 + 28x + 20 to represent the store's weekly profit in dollars, where
    6·1 answer
  • Please help (15 points!!!!) asap
    6·1 answer
  • When D is placed on this square, what will the perimeter of the square be?
    7·1 answer
  • How to evaluate the expression 6x-14
    15·1 answer
  • Solve for x.........
    6·1 answer
  • sohail earn Rs 1500000 in a year if all of this income is taxable how much income tax does he pay ? assume the income tax rate i
    8·2 answers
  • Find an equation of the line, in point-slope form, that passes
    10·1 answer
  • Please help me brainlessly
    8·2 answers
  • A number line is shown below. 6 1/5 Which point is located at ? I will mark brainliest
    8·1 answer
  • Please answer (Only C.)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!