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
Ira Lisetskai [31]
3 years ago
5

HELP ASAP PLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLS

Mathematics
1 answer:
maria [59]3 years ago
8 0

Answer: 12 h ; 45 m

Step-by-step explanation:

*Important: From what I can see in this image, this appears to be a test. If this is the case, please do not cheat. In any case, here is the explanation.

What we know:

  • Progress has been made to 4.75
  • Rate of digging is 3/5 mph
  • Depth must be at least 12 1/2
  • We need to find the minimum amount of time the machine works

How to solve:

By setting up an algebraic equation, we can solve this.

Process:

  • Set up equation                            4.75 + 3/5x = 12 1/2
  • Convert                                          19/4 + 3/5x = 12 1/2

                                                                95/20 + 12/20x = 250/20

  • Subtract                                           -95/20                 -95/20

                                                                               12/20x= 155/20

  • Isolate x via division                                       /(12/20) /(12/20)
  • +Simplify                                                          

                                                                                         x= 12 11/20

  • Convert                                                                    12 h 33 m

Solution: 12 ; 45

You might be interested in
I need to solve this problem
pentagon [3]
The top would the width, the 7. would be height and the last would be the lemgth
5 0
3 years ago
Measures of Center and Variability
pickupchik [31]
1. The mean of all the numbers is 41.
5. Median : 52
3 0
3 years ago
Read 2 more answers
Please help!
loris [4]

m∠B = 33° is the answer.

<u>Step-by-step explanation:</u>

If two triangles ΔABC and ΔMOP are similar,  then their corresponding angles are congruent.

In any triangle, sum of the measure of the angles add up to 180°.

∠A+ ∠B+ ∠C = 180°

∠A  ≅ ∠M

∠B ≅ ∠O

∠C ≅ ∠P

So we can add as,

∠A + ∠B+ ∠P = 180°

45° + ∠B + 102° = 180°

∠B + 147° = 180°

∠B = 180° - 147° = 33°

8 0
3 years ago
When we test Upper H 0​: muequals0 against Upper H Subscript a​: mugreater than​0, we get a​ P-value of 0.03. a. What would the
Anastasy [175]

Answer:

(a) The null hypothesis will be rejected.

(b) Type I error

(c) The null hypothesis will not be rejected. The error is type II error.

Step-by-step explanation:

The hypothesis provided is:

H_{0}: \mu = 0\\ H_{a} : \mu > 0

The p-value of the test obtained is 0.03

(a)

Decision rule for hypothesis testing, based on p-value, states that if the p-value is less than the significance level (α) then the null hypothesis is rejected and vice versa.

The significance level is α = 0.10

Then,

p-value = 0.03 < \alpha  = 0.10

Thus, the null hypothesis will be rejected.

Conclusion:

The null hypothesis is rejected stating that the value of μ is more than 0.

(b)

If the decision in​ (a) is an​ error, i.e. the null hypothesis is rejected when in fact it is true, this type of error is known as type I error.

(c)

The significance level is α = 0.01

Then,

p-value = 0.03 > \alpha  = 0.01

Thus, the null hypothesis will not be rejected.

Conclusion:

The null hypothesis was not rejected stating that the value of μ is 0.

If this decision is an error, i.e. the null hypothesis was not rejected when in fact it is false, this type of error is known as type II error.

3 0
3 years ago
the measure of three angles of a quadrilateral are 80,90,and 103 degrees.Find the measure of the fourth angle.
r-ruslan [8.4K]
<span>87 degrees
https://www.algebra.com/algebra/homework/Parallelograms/Parallelograms.faq.question.313985.html 
</span>
5 0
3 years ago
Other questions:
  • If five different players have to be placed in five different positions on team, how many different ways might his be done
    11·1 answer
  • The 12-inch diameter pizza for $12.50 or the 20-inch diameter pizza for $17.50.
    7·1 answer
  • Find the distance between the point (3,-1) and (-2,3)?
    8·1 answer
  • Lots of points! The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct mi
    12·2 answers
  • Y varies directly as the square of x when x=2 then y =16 find y when x=8
    13·1 answer
  • What fraction is equal to .13
    11·1 answer
  • A cyclist rides his bike at a speed of 6 miles per hour. What is this speed in miles per minute how many miles will the cyclist
    8·1 answer
  • 12 + m &lt; -6 how many solutions
    13·1 answer
  • If you know the area of a circle, how can you find is radius
    15·1 answer
  • PLEASE ANWSER CORRECTLY!! I WILL MARK BRAINIEST!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!