Mathematics Middle School

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?

Answers

Answer 1

Answer:

No, Mia is not correct, the answer is -2.

Step-by-step explanation:

First we are going to use the distributive Property.

Step 1: 2(0.75+0.4). multiply the 2 out. .75m x 2=1.5m and 2 x .4= .8.

We get 1.5m+.8, so 2(0.75+0.4)=1.5m+.8

Now we are going to distribute on the oher side. 4(.5m-.8)

4x .5m=2m and 4x.8=3.2. Keep the sign the same and we get 2m-3.2, so 4(.5m-.8)=2m-3.2

We put this into the new equation to get 1.5m+.8+7.8=-6.4m+2m-3.2

Step 2: combine like terms

.8+7.8= 8.6 and -6.4m +2m =-4.4m

Plug that into our equation and we get 1.5mn+8.6=-4.4m-3.2

Step 3: Switch the sides

Bring -4.4m to the other side to get 1.5m+4.4m=5.9m

One side is 5.9m

We bring 8.6 to the other side to get -8.6. now we do -3.2-8.6=-11.8.

Our new equation is 5.9m=-11.8

divide by 5.9 on both sides to get our answer of

m=-2

Answer 2
no she’s wrong the answer is (-2)

Related Questions

The current balance of Amber’s bank account was $8. She withdrew
$14. Find the new balance in her account.

Answers

Answer:

$-6

Step-by-step explanation:

$(8-14)

= $-6

Hope this helped!

The answer is going to be -14

I need answer ASAP.

Abram was in a contest shooting baskets. He made 20% of his shots. He took a total of 240 shots in the competition. How many baskets did he miss?

Answers

Answer:

192 baskets

Step-by-step explanation:

A bakery sells 4 muffins for $8.60. At that rate, how much would it cost to buy 5 muffins?

Answers

Answer:

5 muffins would be $10.75

Step-by-step explanation:

I you want me to explain just ask.

$10.75
you have to divide 8.60 by 4 to find out how much each muffin costs
the you get 2.15 and multiply that by 5 to get your answer.

help please !! thank u

Answers

Answer:

I think this is pythagorean theorem but I'm not sure what I got was 15 for the answer

i’m pretty sure the answer is 15!

help me plss............................................

Answers

Answer:

im not sure if this is correc but i think it may be  -15 like i said not 100% sure im like 38% sure sorry

Step-by-step explanation:

Answer:

-15

Step-by-step explanation:

:PHOTO: I NEED HELP ASAP

Answers

6:1.5

12:3

18:4.5

24:6

96.8:4,820

48.4:2,420

24.2:1,210

12.1:605

5/ 2 x ≤ -14

A. -10.3
B. -6
C. -5.6
D. -5
Which of these does not make the inequality true?

Answers

Answer:

-5

Step-by-step explanation:

5/2(-5)≤-14 false

-12.5≤ -14 so false

The others are true

Answer -5. Explanation bc I got it right
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