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
ELEN [110]
3 years ago
8

Which operations are commutative and associative?

Mathematics
1 answer:
Vadim26 [7]3 years ago
6 0

Answer:

Step-by-step explanation:

if there are two numbers a and b.then

1. a+b=b+a ,commutative under addition.

2. ab=ba,commutative under multiplication.

If there are three numbers a,b,c then

1. a+(b+c)=(a+b)+c,associative under addition.

2.

a×(b×c)=(a×b)×c ,associative under multiplication.

You might be interested in
Can someone pls pls help me?
Anna35 [415]

Answer:

\large{ \tt{❃ \: EXPLANATION}} :

  • We're provided the figure of trapezium in which 2 m and 7m are the opposite parallel sides and 10m is the height.

  • The formula to found out the area of a trapezium is \frac{1}{2}  \tt{h(a + b)} where h is the height and a & b are the opposite parallel sides .

\large{ \tt{❁ \: LET'S \: START}} :

\boxed{ \large{ \tt{❊ \: AREA \: OF \: TRAPEZIUM \: (A) =  \frac{1}{2} h(a + b)}}}

- Plug the values & then simplify!

\large{ \tt{↬ \frac{1}{2}  \times 10(2 + 7)}}

\large{ \tt{↬ \frac{1}{2} \times 10 \times 9 }}

↬ \boxed{ \large{ \tt{45 \:  {m}^{2} }}}

  • Hence , The required answer is <u>45</u> square meters .

✺ Karma says : If you feel like you are losing everything , remember that trees lose their leaves every year and still they stand tall and wait for better days to come! ♪

♡Hope I helped! ت

☼ Have a wonderful day / evening ! ☪

# StayInAndExplore ! ☂

▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

7 0
3 years ago
How determine if it is proportional
siniylev [52]
If you cross multiply and the answers are the same.
2/5=4/10 because 5*4=20, and 10*2=20
3 0
3 years ago
Umm which ones do i select lol
jeka94

Answer:

2.0yx

jsucyehssnsy

jsjdhsu

3 0
3 years ago
-3[1+2(4+5)]<br> PLease answer ASAP!!!
vaieri [72.5K]

Answer:

-57

Step-by-step explanation:

<h2><u>Use BOMAS</u></h2>

B- brackets

O- of

M- multiplication

A- addition

S - subtraction

-3[1+2(4+5)]

first solve what is in the brackets

(4+5) = 9

place 9 in the brackets

-3[1+2(9)]

now multiply the 2 and 9

2*9 = 18

-3[1+18)]

1+ 18 = 19

now multiply the (-3) with 19

= <u>-57</u>

4 0
4 years ago
Read 2 more answers
What's the ratio if you have 3.5 to 17
lukranit [14]
=3.5:17
3.5×10 to remove decimal point then u multiply 17 by 10 too
=35:170
then you simply yo get 7:34
3 0
4 years ago
Other questions:
  • The angle of elevation from the top of a house to a jet flying 2 miles above the house is x radians. If d represents the horizon
    8·1 answer
  • How to move variable from denominator to numerator?
    9·1 answer
  • What is a quotient???
    10·1 answer
  • Consider a device with 6 parts. For the device to work properly, at least one of the 6 parts need to work. If each part works wi
    6·1 answer
  • Please help me with is. Factor 4x2 + 12x + 5.
    7·2 answers
  • To solve a problem, we often _ _ _ _ _ _ _ _ _ the given information into algebraic expressions and equations
    9·1 answer
  • What is the answer to: y=-2x-5,4x+3y=15 using substitution to solve it..??
    5·1 answer
  • A. -9 1/2<br> B. 1 1/2<br> C. 2 1/2<br> D. 10 1/2
    14·1 answer
  • Which transformation or series of transformations would prove that XYZ is congruent to QRS? Select yes or no for each transforma
    11·1 answer
  • Min has 5/6 dozen blueberry muffins and 1/4 dozen pumpkin muffins.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!