![carolinamleal04](/avatars/42491.jpg)
carolinamleal04
28.01.2021 •
Mathematics
Consider this equation. 7.8+2(0.75m+0.4)=-6.4m+4(0.5m-0.8) Mia solved the equation and determined that m=2. Is she correct?
A She is incorrect because when substituting 2 for m the result was a true statement.
B She is incorrect because when substituting 2 for m the result was a false statement.
C She is correct because when substituting 2 for m the result was a true statement.
D She is correct because when substituting 2 for m the result was a false statement.
Solved
Show answers
More tips
- B Business and Finance How to Get Your Money Back When Lending? Top 7 Ways...
- S Sport How to Learn Swimming? Simple Tips for Beginners...
- P Photography and Videography Understanding HDR: How It Works and Why You Need It...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
Answers on questions: Mathematics
- M Mathematics Sal exercised by stretching and jogging 5 days last week. he stretches for a total of 25 minutes during the week. he jogged for an equal number of minutes each of the 5 days. he exercised...
- M Mathematics Find the first 5 terms....
- M Mathematics choose the appropriate value for x for the following similar triangles given below. ABC~XYZ a:100 b:25 c:60 d:30...
- M Mathematics 5. Add or subtract the rational expressions as indicated. You may leave your answer in factored form. SHOW ALL WORK - do not skip steps. The show all work part cannot be stressed...
- M Mathematics Lorenzo reads at a rate of 45 words per minute. If he reads at a constant rate, how many words can he read in 6 minutes?...
- M Mathematics Please hurry up 1.Two ships B and C are both due east of a point A at the base of a vertical cliff. The diff is 130 metres high. The ship at C is 350 metres from the bottom of the...
- M Mathematics WILL GIVE BRAINLIEST :D Question 2 of 10 Solve the inequality and enter your solution as an inequality comparing the variable to the solution, -14 + x 5 Answer here SUBMIT...
- M Mathematics Alec went on a road trip with some friends. He recorded the following information on their way to their destination: • The trip took 2 hours • The car they took gets 20 • 8 gallons...
- M Mathematics What is the measure of the other angle?...
- M Mathematics An inlet pipe on a swimming pool can be used to fill the pool in 6 hours. The drain pipe can be used to empty the pool in 8 hours. If the pool is 12 filled and then the inlet pipe...
Ответ:
B) She is incorrect because when substituting 2 for m the result was a false statement.
Step-by-step explanation:
Let's solve it for ourselves and see if Mia is correct:
7.8+2(0.75m+0.4)=-6.4m+4(0.5m-0.8)
7.8+1.5m+0.8=-6.4m+2m-3.2
1.5m+8.6=-4.4m-3.2
8.6=-5.9m-3.2
11.8=-5.9m
-2=m
m=-2
Since the answer is actually m=-2, Mia's guess is incorrect because plugging in m=2 does not make both sides equal. Therefore B is the correct option.
Ответ:
answer: math isn’t just mysterious because the majority of us find it so difficult to understand – it’s also the basis of the universe, giving us clues to physical phenomena like the motion of gases in the atmosphere and the way that physical particles interact with each other amid all the possible variables in three-dimensional space.