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
Nonamiya [84]
3 years ago
15

Which statements are true?

Mathematics
1 answer:
GaryK [48]3 years ago
7 0
<h3>Answer:</h3><h3>There are 3 true statements, and the true statements are: </h3><h3>choice A, choice C, choice D</h3>

======================================================

Explanation:

A. True. All triangles have 3 straight sides and 3 angles.

B. False. All triangles are polygons. A polygon is just a collection of line segments glued together to form a closed shape.

C. True. A plane figure is a flat shape.

D. True. See choice A.

E. False. Some triangles do not have one right angle. Example: obtuse triangles do not have any right angles.

You might be interested in
A student repeatedly measures the mass of an object using a mechanical balance and gets the following values: 560 g, 562 g, 556
MrRissso [65]

Answer: 2.76 g

Step-by-step explanation:

The formula to find the standard deviation:-

\sigma=\sqrt{\dfrac{\sum(x_i-\overline{x})^2}{n}}

The given data values : 560 g, 562 g, 556 g, 558 g, 560 g, 556 g, 559 g, 561 g, 565 g, 563 g.

Then,  \overline{x}=\dfrac{\sum_{i=1}^{10} x_i}{n}\\\\\Rightarrow\ \overline{x}=\dfrac{560+562+556+558+560+556+559+561+565+563}{10}\\\\\Rightarrow\ \overline{x}=\dfrac{5600}{10}=560

Now, \sum_{i=1}^{10}(x_i-\overline{x})^2=0^2+2^2+(-4)^2+(-2)^2+0^2+(-4)^2+(-1)^2+1^2+5^2+3^2\\\\\Rightarrow\ \sum_{i=1}^{10}(x_i-\overline{x})^2=76

Then, \sigma=\sqrt{\dfrac{76}{10}}=\sqrt{7.6}=2.76

Hence, the  standard deviation of his measurements = 2.76 g

6 0
3 years ago
The concentration of a drug in an organ at any time t (in seconds) is given by
-Dominant- [34]

Answer:

The concentration of a drug in an organ at any time t (in seconds) is given by s 0.25t - 15(1 - e-t/60) if osts 20 | 15e-t/60 – 10e-(t - 20)/60 if t> 20 where c(t) is measured in milligrams per cubic centimeter (mg/cm3). (a) What is the initial concentration of the drug in the organ? 0 mg/cm3 (b) What is the concentration of the drug in the organ after 14 sec? (Round your answer to three decimal places.) x mg/cm3 38 (c) What is the concentration of the drug in the organ after 40 sec? (Round your answer to three decimal places.) mg/cm3 Need Help? | Read It

7 0
3 years ago
Tonya plans to join a fitness club. She researched the costs to join different clubs in her area and found that there is a linea
Ne4ueva [31]

Answer: 1 club - Club 2

Step-by-step explanation:

You can find the monthly rates by deducting the cost at 12 months from the cost at 24 months and dividing it by 12.

Club 1                                         Club 2                                 Club 3

= (432 - 216) / 12                       = (390 - 210) / 12                 = (504 - 252) / 12

= $18                                          = $15                                   = $21

Multiply these rates by 6 months and any club total cost at 6 month that differs from your answer has a joining fee.

Club 1;                                          Club 2;                                 Club 3

= 18 * 6                                         = 15 * 6                                = 21 * 6

= $108                                          = $90                                  = $126

<em>Same as total cost at              </em><u><em> Joining fee of $30</em></u><em>;      </em>         <em>No joining fee as </em>

<em>6 months so no joining            120 - 90 = $30                      this is the same </em>

<em>fee.                                                                                           as total cost at 6 </em>

<em>                                                                                                 months.</em>

5 0
3 years ago
Read 2 more answers
N the recursive formula f(n) = f(n - 1) + 5, the value of the previous term is represented by
eimsori [14]
F(n-1) = f(n) - 5, based off of the first one
3 0
3 years ago
Jake drew a kite the sketch below of a kite that he wants to make.
Kipish [7]

Answer:

1/2 (40×60)

Step-by-step explanation:

area of kite = 1/2 × diagonal 1 × diagonal 2

3 0
3 years ago
Other questions:
  • What is the similarity between relative dating and radioactive dating?
    13·1 answer
  • PLEASE ANSWER + BRAINLIEST!!!!
    9·1 answer
  • The product of twice a number and four. *
    6·1 answer
  • A water tank holds 648 gallons but is leaking at a rate of 4 gallons per week. A second water tank holds 864 gallons but is leak
    15·1 answer
  • Please help!! Need to evaluate the function for 17-20
    5·1 answer
  • Please help asap or give explanation for brainliest
    15·2 answers
  • Helppppppppppppppppppppppppp
    10·1 answer
  • Two glass containers are shown. Both are right rectangular prisms. Container 1 is filled with water and Container 2 is empty.
    5·1 answer
  • What is 278 minus 149
    14·2 answers
  • On a farm, there is a grain silo.The silo is cylindrical with a tile roof. The silo has a diameter of 8 metres and is 6 metres t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!