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
o-na [289]
3 years ago
7

What is eight equals negative two fifths c?

Mathematics
1 answer:
Maksim231197 [3]3 years ago
8 0
8=-2/5c
8 divided by -2/5
answer: -20 
You might be interested in
Allied Corporation is trying to sell its new machines to Ajax. Allied claims that the machine will pay for itself since the time
kvasek [131]

Answer:

z(s) is in the acceptance region. We accept H₀  we did not find a significantly difference in the performance of the two machines therefore we suggest not to buy a new machine

Step-by-step explanation:

We must evaluate the differences of the means of the two machines, to do so, we will assume a CI  of 95%, and as the interest is to find out if the new machine has better performance ( machine has a bigger efficiency or the new machine produces more units per unit of time than the old one) the test will be a one tail-test (to the left).

New machine

Sample mean                  x₁ =    25

Sample variance               s₁  = 27

Sample size                       n₁  = 45

Old machine

Sample mean                    x₂ =  23  

Sample variance               s₂  = 7,56

Sample size                       n₂  = 36

Test Hypothesis:

Null hypothesis                         H₀             x₂  -  x₁  = d = 0

Alternative hypothesis             Hₐ            x₂  -  x₁  <  0

CI = 90 %  ⇒  α =  10 %     α = 0,1      z(c) = - 1,28

To calculate z(s)

z(s)  =  ( x₂  -  x₁ ) / √s₁² / n₁  +  s₂² / n₂

s₁  = 27     ⇒    s₁²  =  729

n₁  = 45    ⇒   s₁² / n₁    = 16,2

s₂  = 7,56   ⇒    s₂²  = 57,15

n₂  = 36     ⇒    s₂² / n₂  =  1,5876

√s₁² / n₁  +  s₂² / n₂  =  √ 16,2  + 1.5876    = 4,2175

z(s) = (23 - 25 )/4,2175

z(s)  =  - 0,4742

Comparing z(s) and  z(c)

|z(s)| < | z(c)|  

z(s) is in the acceptance region. We accept H₀  we did not find a significantly difference in the performance of the two machines therefore we suggest not to buy a new machine

The very hight dispersion of values s₁ = 27 is evidence of frecuent values quite far from the mean

3 0
3 years ago
ANSWER ASAP DONT SEND A FILE WHATS THE RULE FOR THIS TRANSFORMATION???
Dmitrij [34]

Answer:

the transformation is dilation

6 0
3 years ago
Read 2 more answers
Need help and it's for monday<br><br> is Science
IrinaVladis [17]

Answer:

a. Yes, it will float in oil since it is less dense than oil.

b. No, it won't float in oil since it is more dense than the oil itself.

c. Yes, it will float in water since, the water is more dense than the object itself.

7 0
3 years ago
Read 2 more answers
Instructions: Use the image and your knowledge of the<br> isosceles triangle to find the value of 2.
xz_007 [3.2K]

Answer:

x = 36˚

Step-by-step explanation:

  • The 2 base angles in an isosceles triangle are equal
  • Angles in a triangle sum to 180˚
  • x+72+72=180
  • x+144=180
  • x=180-144=36
6 0
2 years ago
Read 2 more answers
I’ll mark u as brainliest
aniked [119]
Answer: C step by step explanation:
3 0
2 years ago
Other questions:
  • Part 5: Common Core Practice What is the best name that describes all the figures below? Lesson 32
    8·1 answer
  • I need help with matching these vocabulary words​
    12·1 answer
  • you ask 40 students which of three items from the cafeteria they like best 30% of the student picked pizza how many students pic
    6·2 answers
  • Solve the division equation using the model. (1 point)
    15·1 answer
  • Plzzz helpppppp nowwwww
    10·2 answers
  • In which table is y a LINEAR function of x?<br><br> A<br> B<br> C<br> D
    13·1 answer
  • I will give you brainliest if you solve it
    15·2 answers
  • Find the Greatest Common Factor of 20, 30 and 55
    7·2 answers
  • Please explain as well!
    10·2 answers
  • Each of two computers can process bills at 160/min a newer model can process bills at 200/min after the first two computers have
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!