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Oksi-84 [34.3K]
2 years ago
11

The work of a student trying to solve the equation 4(2x − 1) = 11 + 3x + 5 is shown below: Step 1: 4(2x − 1) = 11 + 3x + 5 Step

2: 8x − 4 = 16 + 3x Step 3: 8x + 3x = 16 − 4 Step 4: 11x = 24 Step 5: x = 2.18 In which step did the student first make an error and what is the correct step?
Mathematics
2 answers:
pantera1 [17]2 years ago
6 0
The answer is Step 3: 8x − 3x = 16 + 4, because you have to subtract 3x not add.
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neonofarm [45]2 years ago
3 0
In step three the prblem was incorrect. this is because you have to add four from both sides leading to 8x=20+3x then you have to subtract 3x which is 5x=20. divinding both sides by 5 is:

X=4 
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svetlana [45]

Answer:

J'(2, 1)

K'(0, 3)

Step-by-step explanation:

On a coordinate plane, coordinates of the points J, K and L are (-2, 1), (0, 3) and (2, -1) respectively.

If we reflect these points over the line x = 0 or y-axis, rule to be followed is

(x, y) → (-x, y)

Only sign of x coordinates get changed while y coordinates remain the same.

Following this rule coordinates of the images of J' and K' will be

J(-2, 1) → J'(2, 1)

and K(0, 3) → K'(0, 3)

6 0
2 years ago
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olga55 [171]

Answer:

x = 32

Step-by-step explanation:

9x=288

divde both side by 9

8 0
3 years ago
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In the school store you can buy 20 calculators for $120 how much would 5 calculators be
Masja [62]

Answer:

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Step-by-step explanation:

120/20=6

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Hope this helped.

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3 years ago
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Use the information in the table. You are making a circle graph showing the total number of successful United States space launc
timama [110]

Answer:

52.9°

Step-by-step explanation:

step 1

we know that

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15+470+258+153+146=1,042

step 2

The numbers of successful United States space launches that happened in the years 1980-1989 is equal to

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step 3

The percentage of successful United States space launches that happened in the years 1980-1989 is equal to

\frac{153}{1,042}(100)=14.68\%

step 4

Find out the measure of the central angle you would draw in a circle graph to represent the number of successful United States space launches  that happened in the years 1980-1989

we know that

In a circle, 360 degrees represent the 100%

so

using proportion

Find out the measure of the central angle by a percentage of 14.68%

\frac{360^o}{100\%}=\frac{x}{14.68\%}\\\\x=360^o(14.68\%)/100\%\\\\x= 52.9^o

3 0
3 years ago
What is 3 − |-4| − |2| =
Rainbow [258]

Answer:

-3 your answer

Step-by-step explanation:

3 0
3 years ago
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