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
slavikrds [6]
4 years ago
15

Ms. berkin is dividing her 4 1/2-foot by 6-foot bulletin board into 4 sections with ribbon stretched from each corner to the opp

site corner. How much ribbon does she need?

Mathematics
1 answer:
Mnenie [13.5K]4 years ago
3 0

Answer:

15 feet.

Step-by-step explanation:

A bulletin board has been shown in the figure below.

Where the width of the board AB = DC = 4\frac{1}{2} = 4.5 feet

and the length of the board AD = BC = 6 feet

As Ms. Berkin is dividing the board by stretching the ribbons to the opposite corners so the length of ribbons will be AC and BD.

In right angle triangle <em>ADC</em>, using Pythagorean Theorem,

AC^2=AD^2+DC^2  = 6^2+4.5^2=36+20.25=56.25

AC= \sqrt{56.25} = 7.5 feet

Similarly in triangle <em>BDC</em>,

BD^2=BC^2+DC^2 = 6^2+4.5^2=36+20.25 =56.25

BD=\sqrt{56.25} = 7.5 feet

Thus, total length of the ribbon used = AC + BD = 7.5 + 7.5 = 15 feet

You might be interested in
Maggie cut out 4 right triangles of equal size from construction paper. Each right triangle has a base of 6 inches and a height
Travka [436]

Answer:

24

Step-by-step explanation:

First you multiply 6 and 8 then you divide by 2 to get 24

6 0
3 years ago
Evaluate the expression - |7-9|
timama [110]

Answer: -2

Step-by-step explanation: As our first step, we simplify inside the absolute value. 7 - 9 is -2 so we have -|-2|.

A common mistake at this point in the problem is to change the minus a negative to plus a positive but don't fall into this trap.

We must ignore the negative outside the absolute value until our very last step in this problem.

So we take the absolute value of -2 which is 2 and we have -(2) or -2.

Notice that I used parentheses around the 2 as it comes out of the absolute value.

5 0
4 years ago
Two geometry questions in the attached photos - If I have a line, do I have a plane? &amp; If I have three points, do I always h
Radda [10]

Answer:

18) A: only if you have an additional point not on the line.

19) D: No, because all the points may be on the same line.

Step-by-step explanation:

There are basically 4 ways we can determine a plane and they are;

- When we have three non - collinear points: What this means is that if we have three points that are not on one line, then it means that only one particular plane can pass through those points.

- When we have a line and a point that's not on the line

- When we have two lines that intersect each other.

- When we have two lines that are parallel to each other.

From the four conditions above, we can now answer the question;

18) You can only have a plane if there is an additional point not on the line.

Option A

19) Having just three points may not always be sufficient to have a plane because it's possible that the three points may be on the same line which is not a condition for a plane. Thus, option D is correct.

4 0
3 years ago
Add c to b, then subtract 6 from the result
Arisa [49]

Answer:

Their was not enough recourses for me to work with i am sorry next time be more specific

Step-by-step explanation:

5 0
3 years ago
Which number is the smallest? 4.4 ⋅ 10−5, 3.99 ⋅ 10−6, 2.6 ⋅ 102, 1.85 ⋅ 103
harina [27]
The answer is:  [B]:  " 3.99 * 10⁻⁶ " .
______________________________________________
  Note:
______________________________________________
We are given the following answer choices, and we are asked which one is the "smallest number" :
_______________________________________________
  [A]:  4.4 * 10⁻⁵
_________________________________________
  [B]:  3.99 ⋅ 10⁻⁶
______________________
  [C]:  2.6 ⋅ 10²
______________________
  [D]:  1.85 ⋅ 10³
_______________________
         We can rule out answer choices: [C] and [D]; since these values, essentially "direct us" to move the decimal point FORWARD "2 places" and "3 places", respectively;  whereas choices [A] and [B] essentially "direct us" to move the decimal point BACKWARD "5 places" and "6 places" respectively.  Note that all values given in the answer choices are written in proper "scientific notation" —that is, beginning with a "single integer followed by (a) decimal point(s) and then additional digits (when needed).  So, the answer choice that essentially "directs us" to move the decimal point BACKWARD "6 places" —
___________________________________________________
             →   Answer choice:  [B]:  " 3.99 * 10⁻⁶ "  ;
______________________________________________
                  is the smallest value ; and as such, the correct answer.
________________________________________________________
7 0
3 years ago
Read 2 more answers
Other questions:
  • X^(2)-8x=0 solve using quadratic formula
    14·1 answer
  • -3 1/10 + 6 3/10 in form of decimal
    10·1 answer
  • Breyanna is filling 2.7 ounce bottles with a lavender scented lotion she made for gifts she was able to fill 9.5 bottles how man
    14·1 answer
  • A rotating sprinkler sprays a steady stream of water that is 9 feet long. If the sprinkler makes a full rotation, what is the ap
    14·1 answer
  • How do i show my work for 5a+6=-6a
    8·1 answer
  • Is the equation below a function? explain<br>d) y2 = x2 + 5​
    12·1 answer
  • Need Help Bro Tryna hurry up and this over with lol
    9·1 answer
  • Mr. Walker asked his students to use the associative property to find an expression that is equivalent to (13 + 15 + 20) + (20 +
    11·1 answer
  • Help please <br>find the value ​
    8·2 answers
  • Jessie bought a vacuum cleaner priced at $79 with a 6% sales tax rate. What is the total cost of the vacuum cleaner after-
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!