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VashaNatasha [74]
2 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]2 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

pogonyaev2 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 -×-=+

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How many miles per hour is this? (one furlong is 18 mile, and a fortnight is 14 days. a furlong originally referred to the lengt
WITCHER [35]

the complete question is

While driving in an exotic foreign land you see a speed limit sign on a highway that reads 180,000 furlongs per fortnight. How many miles per hour is this? (One furlong is 1/8 mile, and a fortnight is 14 days. A furlong originally referred to the length of a plowed furrow.)

Step 1

<u>convert (furlongs per fortnight) to (miles per fortnight)</u>

180,000 furlongs per fortnight=180,000*(1/8)=22,500 miles per fortnight

Step 2

<u>convert miles per fortnight to miles per hour</u>

1 day=24 hour

14 day=24*14=336 hours

22,500 miles per fortnight=22,500/336=66.96 mph

therefore

<u>the answer is</u>

66.96 mph

7 0
2 years ago
You want to order carpet for an area in your house. The room measures 12 feet by 10 feet. Remember, Area = Length × Width. If ea
pochemuha

Answer:

402.9 $

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3.33 , 4

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3.33 x 4 = 13.32 square yards

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4 0
2 years ago
What is the x-intercept of the line with the equation -2x+1/2y=18
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The x-intercept is a point on the x-axis.
y=0 at every point on the x-axis.

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7 0
2 years ago
Without actually writing the formula, explain how to expand (x + 3)7 using the binomial theorem.
dusya [7]

To write the coefficients of the 8 terms, either start with a combination of 7 things taken 0 at a time and continue to 7 things taken 7 at a time or use the 7th row of Pascal’s triangle.


For the first term, write x to the 7th power and 3 to the 0 power. Then decrease the power on x and increase the power on y until you reach x to the 0 and y to the 7.


Simplify by evaluating the coefficients and powers of 3.

8 0
2 years ago
Read 2 more answers
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8090 [49]

Answer:

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Step-by-step explanation:

Ratio of income in 2001 to 2003:

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Then, you can simplify by dividing both sides by 6:

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Can't simplify anymore, Therefore this is the answer!

8861 : 9495

Hope I helped! Have a good day :)

6 0
2 years ago
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