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
coldgirl [10]
3 years ago
12

The work of a student to solve the equation 2(5y – 2) = 12 + 6y is shown below: Step 1: 2(5y – 2) = 12 + 6y Step 2: 7y – 4 = 12

+ 6y Step 3: y – 4 = 10 Step 4: y = 14 Step 5: y = 7 In which step did the student first make an error and what is the correct step? (1 point) A: Step 2: 7y – 4 = 6 + 3y B: Step 2: 10y – 4 = 12 + 6y C; Step 3: 5y – 2 = 2(10 + 3y) D: Step 3: 2(5y – 2) = 10 + 3y
Mathematics
2 answers:
kirza4 [7]3 years ago
7 0
2(5y - 2) = 12 + 6y
7y - 4 = 12 + 6y ⇒ wrong, it has to be: 10y - 4 = 12 + 6y

so the correct answer is B 
gogolik [260]3 years ago
3 0

Answer:

Option B

Step 2: 10y-4=12+6y

Step-by-step explanation:

We are given that an equation

2(5y-2)=12+6y

We are given steps which are solved by student .We have to find the first  error he makes in her/his  steps and correct it.

Step1:2(5y-2)=12+6y

Step 2: 10y-4=12+6y

But student did in step 2: 7y-4=12+6y

So , he makes error in step 2

Step 3: 10y-6y=12+4

Step 4: 4y=16

Step 5: y=\frac{16}{4}=4

Hence, option B is true , step 2:10y-4=12+6y

You might be interested in
Is the following correct? explain. 296 ÷ 6= 48 r8
Sergio [31]
No. 
8 can be divided by 6 one more time. the correct answer should be 49 r2
3 0
3 years ago
Determine whether the rule represents an exponential function. Explain why or why not.
Alenkasestr [34]

Answer:

Yes.

Step-by-step explanation:

Exponential Parent Function: f(x)= a(b^{x})

If we write out the equation:

y = 6(5)^{x}

Whenever we have an exponent of <em>x</em>, it is a exponential function. The 5 is simply the base of the exponent and the 6 means we are vertically stretching the graph by a factor of 6.

5 0
3 years ago
Use the Pythagorean theorem to solve for x
Andre45 [30]

Answer: 15

Step-by-step explanation:

12^2 + 9^2 = 225

square root of 225 = 15

5 0
2 years ago
the area of the surface of the swimming pool is 210 feet . what is the length d of the deep end ( in feets )?
zlopas [31]
<span>this is how i did it
 10(9)(d)= 210
  90d= 210
  d=2.3 feet.</span>
3 0
3 years ago
In January Caleb could do 12 pushups. In May Caleb could do 15 pushups. By what percent did he increase the number of pushups he
Nimfa-mama [501]

Answer:

by 3% percent

Step-by-step explanation:

i hope this helps ._.

5 0
1 year ago
Read 2 more answers
Other questions:
  • For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation. x y 32 24 16 8 8
    15·1 answer
  • 7th grade math help me plzzz
    10·1 answer
  • Identify the vertex of the function, f(x) = 3(x - 1)2 + 5.
    15·2 answers
  • Help ASAP Please!! 20 points!! Thank you!! This is highly appreciated!!!
    15·1 answer
  • 325.4 miles on 17.3 gallons
    8·1 answer
  • In an all boys school, the heights of the student body are normally distributed with a mean of 70 inches and a standard deviatio
    13·2 answers
  • Benz and Jacobs Accounting purchased a new computer system for $3,500. The total resale value after 5 years is estimated to be $
    14·1 answer
  • Kai wrote the number 85 on the board. Is 85 prime or composite?
    10·1 answer
  • I need help answering this ASAP
    10·1 answer
  • Is this correct? the question is asking if the triangle would have a right, acute, or obtuse angle.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!