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
lana66690 [7]
3 years ago
7

Help please! thank u

Mathematics
1 answer:
Alexus [3.1K]3 years ago
5 0
A is NOT a function because for some values of x you get more than one y value. For example if x=2 you get 2 values for y.
b is a function because for each x you get ONLY one y
You might be interested in
Which story problem could be solved using the division problem 30 ÷ 5 = 6?
Lynna [10]

Answer:

"There are 30 chairs in 5 rows. How many chairs are in each row?" Would be the correct story problem.

8 0
3 years ago
Two​ shooters, Rodney and​ Philip, practice at a shooting range. They fire rounds each at separate targets. The targets are mark
Sedaia [141]

Complete Question

Answer:

a

  SE  = 0.66}

b

-3.29 <  \mu_1 - \mu_2 <  -0.70  

Step-by-step explanation:

From the question we are told that

  The sample size is  n  = 60

   The first sample mean is  \= x _1  =  8

    The second sample mean is   \= x _2  =  10

    The first variance is  v_1 =  0.25

    The first variance is  v_2 =  0.55

Given that  the confidence level is 95% then the level of significance is 5% =  0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally the first standard deviation is  

     \sigma_1 =  \sqrt{v_1}

=>   \sigma_1 =  \sqrt{0.25}

=>   \sigma_1 =  0.5

Generally the second standard deviation is

     \sigma_2 =  \sqrt{v_2}

=>   \sigma_2 =  \sqrt{0.55}

=>   \sigma_2 =  0.742    

Generally the first standard error is

     SE_1  =  \frac{\sigma_1}{\sqrt{n} }

      SE_1  =  \frac{0.5}{\sqrt{60} }

     SE_1  =  0.06

Generally the second standard error is

     SE_2  =  \frac{\sigma_2}{\sqrt{n} }

      SE_2  =  \frac{0.742}{\sqrt{60} }

     SE_2  =  0.09

Generally the standard error of the difference between their mean scores is mathematically represented as    

      SE  =  \sqrt{SE_1^2 + SE_2^2 }

=>     SE  =  \sqrt{0.06^2 +0.09^2 }

=>     SE  = 0.66}

Generally 95% confidence interval is mathematically represented as  

      (\= x_1 -\= x_2) -(Z_{\frac{\alpha }{2} } *  SE) <  \mu_1 - \mu_2 <  (\= x_1 -\= x_2) +(Z_{\frac{\alpha }{2} } *  SE)

=> (8 -10) -(1.96 *  0.66) <  \mu_1 - \mu_2 <  (8-10) +(Z_{\frac{\alpha }{2} } *  0.66)  

=>  -3.29 <  \mu_1 - \mu_2 <  -0.70  

 

5 0
3 years ago
V=1/3 Bh, for h<br> A. h= 3V/B<br> B. h=B/3V<br> C. h=V/3B<br> D.h=3B/V
Basile [38]

Answer:

A. h=3v/b

Step-by-step explanation:

v=1/3bh

1) divide by b

v/b=1/3h

2) multiply reciprical

3v/b=h

h=3v/b

3 0
3 years ago
39-12w=7-16 work to plz?
frutty [35]

Answer:

w=4

Step-by-step explanation:

7-16=-9

39-x=-9

39+9=48

39-48=-9

x=48

48/12=4

w=4





7 0
3 years ago
Shirley benson works for levityskool assembling toys. she is paid $2.20 for each item she assembles. how much does she earn for
Natalka [10]
She earns 2.2*278=611.60$
3 0
3 years ago
Read 2 more answers
Other questions:
  • The measure of an exterior angle of a regular polygon is 15 degrees. What is the sum of the measures of the interior angles of t
    15·2 answers
  • (1. A jacket's original price is $65.00. it is on sale for 40% off. you have to pay 5% sales tax. what is the final price for th
    10·2 answers
  • In a certain state, fishing licenses are in the form of LLL NN, where L stands for a letter of the alphabet and N stands for a o
    12·2 answers
  • How would I start to solve this? <br> Y=-1/3-1
    5·1 answer
  • I need your help, please answer!!
    13·1 answer
  • Find two numbers whose ratios is 3 to 5 and whose sum is 88​
    13·1 answer
  • The sum of two integers is -360. One of them is 60, then the other integer is
    10·1 answer
  • Miss Violet is buying granola bars for her students. She already has 16 granola bars in her desk and needs a total of 100 bars.
    14·2 answers
  • A dependent means t-test determines if the differences between scores on the pretest and posttest measures differ significantly
    7·1 answer
  • Can someone please help me with this geometry homework?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!