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
VashaNatasha [74]
3 years ago
15

Maura writes an expression equivalent to 8a - (-3 - 5a) - 2a. Her work is in the picture. In what step does Maura make a mistake

? Describe her error and find the correct equivalent expression.
* 8a - (-3 - 5a) -2a *

Step 1: 8a + 3 - 5a - 2a
Step 2: (8a - 5a - 2a) + 3
Step 3: (3a - 2a) + 3
Step 4: a + 3
Mathematics
2 answers:
NISA [10]3 years ago
7 0

Answer:

11a + 3

Step-by-step explanation:

Step 1 : 8a + 3 - 5a - 2a

error => - 5a

8a - (- 3 - 5a) - 2a =

= 8a + 3 + 5a - 2a

= (8a + 5a - 2a) + 3

= 11a + 3

pogonyaev3 years ago
7 0

Answer:

11a+3

Step-by-step explanation:

8a-(-3-5a)-2a

Open the bracket first

8a+3+5a-2a

Collect like terms

8a+5a-2a+3

13a-2a+3

11a+3

So the final answer is 11a+3

The error is the that when you open the bracket the minus outside the bracket will multiply everything inside the bracket...and -×-=+

You might be interested in
one room length 12.8 and breadth equals to 850 CM inside that room there is a bad length is 300 cm and breadth is 400 cm find th
9966 [12]

Answer:

Area = 968000cm^2

Step-by-step explanation:

To be able to answer this question properly. I'll assume the length of the room is in meters.

So for the room, we have:

Length = 12.8m

Breadth = 850cm

For the bed, we have:

Length = 300cm

Breadth = 400cm

First, we calculate the surface area of the room.

A_1 = 12.8m * 850cm

Convert all units to cm

A_1= 12.8*100cm * 850cm

A_1= 1 088 000 cm^2

Next, we calculate the area of the bed

A_2 = 300cm * 400cm

A_2 = 120000cm^2

The area of the space left  is the difference between A1 and A2

Area = A_1 - A_2

Area = 1088000cm^2 - 120000cm^2

Area = 968000cm^2

5 0
3 years ago
How high would you have to count before you would use the letter A in the English language spelling of a whole number?
andrew11 [14]
Would it not be one hundred and[insert number]?
7 0
3 years ago
A culture of yeast doubles in size every four hours. If the yeast population is estimated to be three million now, what will it
Bess [88]
It doubles every 4 hours, so after 24 hours there will be 6 doublings.
2^6 = 64
So, the population will be (3,000,000 * 64) or 192,000,000 in 24 hours.
The answer is B.


4 0
4 years ago
Read 2 more answers
Find the measure of angle ∡4
dexar [7]
Since they share the same angle measurement, and 4 is smaller than 158 degrees, you subtract 158 from 180 and angle 4 = 22 degrees
7 0
4 years ago
Three of exterior angle of n-sided polygon are 50° each two of it's interior angle are 127° and 135° and the remaining interior
irga5000 [103]

Answer:

The value of n is 21.

Step-by-step explanation:

We are given that three of the exterior angle of the n-sided polygon are 50° each two of its interior angle are 127° and 135° and the remaining interior angle are 173 each.

As we know that the sum of all exterior angles of the polygon is 360°. Also, the number of remaining interior angles will be (n - 5).

And, the exterior angle = 180° - the interior angle.

So, according to the question;

(3 \times 50) + (180-127) + (180 - 135) + (n - 5)\times (180-173) =360

150 + 53 + 45 + 7(n - 5) = 360

248 + 7n - 35 = 360

213 + 7n = 360

7n = 360 - 213

7n = 147

n = \frac{147}{7}

n = 21

Hence, the value of n is 21 and this is a 21-sided polygon.

4 0
3 years ago
Other questions:
  • A hole is drilled in a sheet-metal component, and then a shaft is inserted through the hole. The shaft clearance is equal to dif
    5·1 answer
  • Brian has reduced his cholesterol level by 20% after his last check up. If his original level was 320, what is his cholesterol l
    10·1 answer
  • 75 EASY POINTS Whats 2.14*3/49+947?
    11·2 answers
  • What is the greatest common factor of 24s^3, 12s^4, and 18s?
    12·2 answers
  • Ok Ben runs at 7 metres per second. He runs 210 metres. How<br> long does it take him?
    8·1 answer
  • PLS HELP ME WITH THISS THANK YOU !
    10·2 answers
  • This is some epic math that needs to be solved in a amount of time that is long
    10·2 answers
  • 5. To have integrity means that you A. usually tell the truth B. only cheat when it's necessary C. are honest and trustworthy D.
    13·1 answer
  • If y^3=64,what is y?
    15·1 answer
  • if a car travels 374 meters in 17 seconds. A bus travels 414 meters in 23 seconds which vehicle is faster how much faster
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!