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
natta225 [31]
3 years ago
10

A shoe shop decides to test out a few pairs of

Mathematics
1 answer:
Mademuasel [1]3 years ago
4 0
A. All people ❌
B.shops❌
C.control❌
D.shoes ✅✅✅✅✅✅
You might be interested in
Which of the following is equal to sqrt of -16?<br> 1.)-4t<br> 2.)-4<br> 3.)4t<br> 4.)4
motikmotik
4, because you can't have a negative square root.
6 0
3 years ago
Help please!!! Will Mark brainy!!!
My name is Ann [436]

Answer:

d

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
show that thw roots of the equation (x-a)(x_b)=k^2 are always real if a,b and k are real. Please I really need help with this
VLD [36.1K]

Answer:

see explanation

Step-by-step explanation:

Check the value of the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real

• If b² - 4ac = 0 roots are real and equal

• If b² - 4ac < 0 then roots are not real

given (x - a)(x - b) = k² ( expand factors )

x² - bx - ax - k² = 0 ( in standard form )

x² + x(- a - b) - k² = 0

with a = 1, b = (- a - b), c = -k²

b² - 4ac = (- a - b)² + 4k²

For a, b, k ∈ R then (- a - b)² ≥ 0 and 4k² ≥ 0

Hence roots of the equation are always real for a, b, k ∈ R


           

8 0
3 years ago
Multiple<br>1. Which of the following is Eular's formula?<br>OE-V + F = 2<br>OV-E+ F = 2​
Alinara [238K]

Answer:

see explanation

Step-by-step explanation:

Euler's formula for polyhedra is

V- E + F = 2

where V is number of vertices, E number of edges and F number of faces

6 0
3 years ago
Use a 95​% prediction interval to predict the useful life of a brand A cutting tool when the cutting speed is 45 meters per minu
qwelly [4]

Answer:

<em>The answer resides in the explanation.</em>

<em>Pls rate as brainliest </em>

Step-by-step explanation:

The predicted useful life of a brand A cutting tool when the speed is 45 meters per minute is 1.2 to 5.5 hours.

The predicted useful life of a brand B cutting tool when the speed is 45 meters per minute is 3.4 to 5.4 hours.

The prediction interval for brand A is larger than the prediction interval for brand B because the estimated standard error of  y^ is different for the two intervals.

The prediction intervals are both larger than the corresponding confidence intervals.

The standard error for the estimated mean value of y is smaller than the standard error for the predicted value of y.

The predicted useful life of a brand A cutting tool that is operated at 100  meters per minute is -0.59 hours

The actual predicted useful life of a brand A cutting tool when the speed is 100 meters per minute is 0.0 to 2.3 hours.

6 0
3 years ago
Other questions:
  • What is the absolute value of the complex number -4-sr2i
    8·1 answer
  • WILL UPVOTE
    14·1 answer
  • Please help with this question!
    8·1 answer
  • 67/6 as a mixed number
    11·2 answers
  • How do you state a sequence to find out if its a arithmetic
    5·1 answer
  • The number of people that can be safely carried in a lift depends on their mass. A lift will safely
    7·1 answer
  • I screenshot the question.
    14·1 answer
  • A triangle has an area of 30 cm². The base and height are scaled by a factor of 3.
    13·1 answer
  • Need Help ASAP Will Mark Brainliest
    6·1 answer
  • 410x44 with parshal product
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!