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
fenix001 [56]
3 years ago
13

The numbers of students in the four sixth-grade classes at Northside school are 26,19,34 and 21. Use properties to find the tota

l number of students in the four classes.
Mathematics
1 answer:
san4es73 [151]3 years ago
6 0
Basically there are 3 addition properties and they are associative property, identity property, and commutative property. 

Commutative property is just changing the order of the addends. Example: 26+19+34+21= 21+34+19+26

Identity Property is just adding a 0 to the number that doesnt change anything. Example: 26+19+34+21 +0 = 100

Associative property is just changing the grouping of the addends. Example: (26+19) + (34+21) 
You might be interested in
EXPERTS HELP!! Jane was playing a game with her sister, Sally. Jane was down by 7. After her next turn, she was down by 3. Which
max2010maxim [7]
............Te he answer is C
6 0
3 years ago
Read 2 more answers
Simplify the imaginary number sqr -12
Anastaziya [24]

Answer:

\sqrt{-12} = i\sqrt{12} = i\sqrt{4\cdot 3} = 2i\sqrt{3}

Step-by-step explanation:

8 0
3 years ago
Is 2/3 greater than 8/12
likoan [24]
2/3 is exactly the same as 8/12
5 0
3 years ago
Read 2 more answers
Please help me AAAAAA
bezimeni [28]

Answer:

45

Step-by-step explanation:

AEF is a similar triangle to ABC. that means it has the same angles, and the sides (and all other lines in the triangle) are scaled from the ABC length to the AEF length by the same factor f.

now, what is f ?

we know this from the relation of AC to FA.

FA = 12 mm

AC = 12 + 28 = 40 mm

so, going from AC to FA we multiply AC by f so that

AC × f = FA

40 × f = 12

f = 12/40 = 3/10

all other sides, heights, ... if ABC translate to their smaller counterparts in AEF by that multiplication with f (= 3/10).

the area of a triangle is

baseline × height / 2

aABC = 500

and because of the similarity we don't need to calculate the side and height in absolute numbers. we can use the relative sizes by referring to the original dimensions and the scaling factor f.

baseline small = baseline large × f

height small = height large × f

we know that

baseline large × height large / 2 = 500

baseline large × height large = 1000

aAEF = baseline small × height small / 2 =

= baseline large × f × height large × f / 2 =

= baseline large × height large × f² / 2 =

= 1000 × f² / 2 = 500 × f² = 500 ×(3/10)² =

= 500 × 9/100 = 5 × 9 = 45 mm²

8 0
2 years ago
At Lakeview middle school,there are 2 homeroom teachers assigned to every 48 students. is the number of stuff at this school pro
Zielflug [23.3K]
Yes becuase constant rate will be 24/1
and when you keep subtracting 1 to the x value & and 24 to y value it will end with 0,0 meaning its proportion
6 0
3 years ago
Other questions:
  • 0-5lbs.-$2. 5-10lbs-$4 10-20lbs-$6
    10·1 answer
  • Jenny goes to dance class every 6 days, karate class every 12 days, and to the library
    6·2 answers
  • The table shows the height of a flower as it grows. What equation in slope-intercept form gives the flower's height at any time?
    6·2 answers
  • A <br> B <br> C or D please help
    6·1 answer
  • The jeweler buys gold for 1235.55 per ounce and resells it for 1376.44 per ounce how much profit does the jeweler make from buyi
    9·1 answer
  • Answer the following questions (a) Given point P(3, −2, 7) in R 3 , find the distance of point P from (i) x−axis Answer: (ii) y−
    5·1 answer
  • Simplify √16/√11 in terms of surds<br>​
    14·1 answer
  • What table would it be ??????
    6·1 answer
  • The question is attached with a document.
    11·1 answer
  • Seven is at most the quotient of a number d and −5 .
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!