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
maw [93]
3 years ago
11

Mr. Burke had 40 pencil. He gave his class 1/5 of the pencils.Then he packed away 1/4 of the pencils that reminded. All the othe

r pencil were faulty,so he threw them away. How many pencils were thrown away
Please help me
Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
8 0

Answer:

26 pencils were thrown away.

Step-by-step explanation:

1/5 = 8/40

1/4 = 6/32

add them together 18/40

26 were thrown out

You might be interested in
Prove: Every point of S=(0, 1) is an interior point of S.
myrzilka [38]

Answer:

Proved

Step-by-step explanation:

To prove that every point in the open interval (0,1) is an interior point of S

This we can prove by contradiction method.

Let, if possible c be a point in the interval which is not an interior point.

Then c has a neighbourhood which contains atleast one point not in (0,1)

Let d be the point which is in neighbourhood of c but not in S(0,1)

Then the points between c and d would be either in (0,1) or not in (0,1)

If out of all points say d1,d2..... we find that dn is a point which is in (0,1) and dn+1 is not in (0,1) however large n is.

Then we find that dn is a boundary point of S

But since S is an open interval there is no boundary point hence we get a contradiction. Our assumption was wrong.

Every point of S=(0, 1) is an interior point of S.

3 0
3 years ago
Max adds 7 to a number the. Múltiples the sum by -4 the result is 3 times the same number write and since an equation to find th
GrogVix [38]

Answer:

The number is -4.

Step-by-step explanation:

Let the number be n.

Given:

Max adds 7 to a number.

hence it is given as n+7

Multiply's the sum by -4 the result is 3 times the same number.

Hence the equation can be written as;

-4(n+7)=3n

Now Solving the above equation to find value of n we get;

-4(n+7)=3n\\-4n-28=3n\\-4n-3n=28\\-7n=28\\n=\frac{28}{7}=-4

The value of n is -4.

Now when we add 7 to number -4 we get answer as 3.

And when the sum is multiplied by -4 we get answer -12.

Also 3 times of number is equal to 3 multiplied by -4 we get answer as -12.

Hence when the sum is multiplied by -4  it is equal to 3 times of same number.

Hence from above we can say that the number is -4.

7 0
3 years ago
A 90% confidence interval for a proportion is found to be (0.62, 0.68). What is the sample proportion?
Ludmilka [50]

Answer:

B. 0.65

Step-by-step explanation:

Sample proportion is the point estimate of the population proportion which is at the centre of the interval

(0.62+0.68)/2

1.30/2

0.65

3 0
3 years ago
Read 2 more answers
which number is a solution of the equation l8c sided 5 use the number line to help answer the question A2B 2.5 c5d 6.5 ​
max2010maxim [7]

Answer:

Can I see a picture?

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Help, please :)<br> appreciate it
myrzilka [38]

27). 8a+7

28). 10k-1

29). 2n-48

30). x+16

31). 14b+3c-3

32) -2y=10

6 0
3 years ago
Other questions:
  • X^2+10x+5=30 quadratic equation
    15·1 answer
  • Some seventh-grade students at Michaelson Middle School were surveyed to find the amount of time they spent doing homework over
    10·1 answer
  • The quotient of ten to the power and ten cubed
    9·1 answer
  • A rectangular prism has a length of 1 1/4 yd, a width of 2 1/2 yd, and a height of 4 yd. Enter the volume of the prism as a mixe
    8·1 answer
  • Construct a triangle ABC where BC =4cm ,B=60° and AB+AC=6cm
    7·1 answer
  • Mr. Shipley is in charge of a school trip. 317 students will go on the trip. Thhe school had seven buses and one van. If the van
    15·1 answer
  • Please help me thanks
    15·2 answers
  • Wilma can mow a lawn in 60 minutes. Melissa can mow the same lawn in 30 minutes. How long does it take for both Wilma and Meliss
    6·2 answers
  • A car traveled 180 miles at a constant rate. Write an equation that would
    8·1 answer
  • What is an equation of a line that passes through (0,3) and (2,4)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!