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
ankoles [38]
4 years ago
12

Lin divides 2.5d from both sides on the equation 7.5d=2.5d. Elena subtracts 2.5d from each side of the equation. Who’s right?

Mathematics
1 answer:
zavuch27 [327]4 years ago
4 0

Answer:

Elena's right

Step-by-step explanation:

Well, in the equation: 7.5d = 2.5d. Lin can divides 2.5d from both sides if the d≠0. If d=0, Lin cannot divides 2.5d from both sides.

So, Elena subtracts 2.5d from each side of equation is correct.

Lin method:

7.5d = 2.5d ⇔ \frac{7.5}{2.5} = 1

Wrong equation.

Elena method:

7.5d = 2.5d ⇔ 5d = 0 ⇔ d=0

Conclusion: Elena's right

You might be interested in
The gross domestic product of China was $5,739 billion in 2010, and the gdp of Sweden was 435 billion . The population of China
Sergeeva-Olga [200]

Answer:

Sweden's per capita is greater than China.

Step-by-step explanation:

To calculate GDP per capita, we will divide the country's gross domestic product by its population.

The gross domestic product of China was $5,739 billion and population is 1347 million.

The GDP of Sweden was 435 billion and the population of Sweden is bout 9.5 million.

The GDP per capita of China = \frac{5739000000000}{1347000000} = $4620.58

The GDP per capita of Sweden = \frac{435000000000}{9500000} = $45789.47

Hence, we can see that Sweden's per capita is greater than China.

8 0
4 years ago
W/3 =9 <br> what is w ? W=____
RUDIKE [14]

Answer:

27

Step-by-step explanation:

27÷3 = 9

lllllllllllllllll

l

8 0
4 years ago
Read 2 more answers
Simplify the problem thank you
NikAS [45]

Given the expression:

\displaystyle \large{ \sqrt[3]{ - 125} }

Definition:

\displaystyle \large{ y  = \begin{cases}   \pm \sqrt[n]{x}  \longrightarrow n  = (2,4,6,8,...)  \:  \: (x \geqslant 0) \\   \sqrt[n]{x}\longrightarrow n = (1,3,5,7,...) \:  \: (x \in \R) \end{cases}}

First, factor the -125. -125 comes from (-5)×(-5)×(-5) or (-5)^3.

\displaystyle \large{ \sqrt[3]{ ( - 5) \times ( - 5) \times ( - 5)} }

Because if (-5)^2 = 25 then 25×(-5) again will be -125.

Since this is the cube root, we have to pull out 3 terms in one. There are 3 fives that we can take off and therefore,

\displaystyle \large \boxed{ - 5}

5 0
3 years ago
Read 2 more answers
Plzzzzzz help (28 + 7 + 6 + 3) X 1/2 explain
xeze [42]
28/7 + 6/3 first divide 28/7
4 + 6/3 the divide 6/3
4 + 3 and then add them up which is 7
7 divide 1/2
Which is 14
HAVE A GREAT DAY:) !
7 0
3 years ago
Which of the following are geometric sequences?
olga2289 [7]
2,3,4 options are geometric sequences I believe.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Explain the error in the solution below. What additional step needs to be completed? log x – log53 = 2log53 log x = 3log53 log x
    5·2 answers
  • Please help ive been stuck on this question<br> Thank you!!!
    8·1 answer
  • WILL MARK BRAINLIEST! NEED HELP!
    10·2 answers
  • ???????????????????????????????????????????????????
    15·1 answer
  • What would you buy if you had $125,000?
    11·1 answer
  • I need some help with this question was on my math homework ​
    10·2 answers
  • Four Boys and Five Girls went to a water park. The total cost for the group was $144. What was the cost of admission for each pe
    7·2 answers
  • Pls help me, if you get it right I will give you Brainlist!​
    5·1 answer
  • Use the given information to write an equation for each line slope 6, y-intercept 4
    14·1 answer
  • A rectangle has an area of 30 square meters and a perimeter of 34 meters. What are the dimensions of the rectangle.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!