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Over [174]
3 years ago
6

Your friend incorrectly says the solution to the equation 11.2y - 7.4y=141.36 is y=7.6 what error did your friend make? A) Divid

ed incorrectlyB) Added 7.4y+11.2y C) Solved for 1/y instead of yD) Subtracted like terms incorrectly
Mathematics
1 answer:
krek1111 [17]3 years ago
8 0

The correct answer is: D) Subtracted like terms incorrectly

Step-by-step explanation:

Given

11.2y - 7.4y=141.36

The terms 11.2y-7.4y need to be subtracted. But option b is to add them. We will add them and then solve the equation to see if its right.

So adding 11.2y-7.4y

18.6y=141.36

Dividing both sides by 18.6

\frac{18.6y}{18.6}=\frac{141.36}{18.6}\\y=7.6

so by adding the terms instead of subtracting we get y=7.6.

this means that the error was adding 7.4y-11.2y instead of subtracting

The correct method will be:

11.2y - 7.4y=141.36\\3.8y=141.36

Dividing both sides by 3.8

\frac{3.8y}{3.8}=\frac{141.36}{3.8}\\y=37.2

Hence,

The correct answer is: D) Subtracted like terms incorrectly

Keywords: Linear equation, Expression

Learn more about linear expressions at:

  • brainly.com/question/4460262
  • brainly.com/question/4464845

#LearnwithBrainly

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What multiples of 6 are not factors of 68?
8_murik_8 [283]
Factors for 68: 1,2,4,17,34,68,<span>
Multiples of  6: </span>6<span>,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96,102,108,114,120,126,132,138,144,150,156,162,168,174,180,186,192,198,204,210,216,222,228,234,240,246,252,258,264,270,276,282,288,294

Multiples for 68: </span>68,136,204,272,340,408,476,544,612,680,748,816,884,952,1020,1088,1156,1224,1292,1360,1428,1496,1564,1632,1700,1768,1836,1904,1972,2040,2108,2176,2244,2312,2380,2448,2516,2584,2652,2720,2788,2856,2924,2992,3060,3128,3196,3264,3332,

Factors of 6: <span>1,2,3,6

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8 0
4 years ago
Describe how you would use the Distributive​
S_A_V [24]
We usually use the distributive property because the two terms inside the parentheses can't be added because they're not like terms.
Make sure you apply the outside number to all of the terms inside the parentheses/brackets.
4 0
3 years ago
The manufacturing cost of a cell phone was $136. Sellers first marked up the cost by 25 percent. Sales were poor, so sellers dec
Helen [10]
Manufacturing cost = $136
sellers added 25% = $ 136 * 25/100 = $34 
manufacturers cost + 25% = $136 + $34 = $170. 
old selling price = $170

Sellers decreased the markup to 17% (of manufacturing cost): $136 x 17/100  = $23.12
New selling price = $136 + $23.12 = $153.12

both of these answers show: original cost + markup value 


6 0
3 years ago
The volume of a cube is 125m find it's side​
leonid [27]

Answer:

41.6666666667m ( round to nearest whole number if you need to) -> 42m

Step-by-step explanation:

To find the volume

You multiply the length, width, and height. ( V= LxWxH)

So, divide 125 by 3 and you get 41.6666666667.

To check your answer: 41.6666666667 times 3 and you get 125.

I HOPE THIS HELPS YOU!!  :)

7 0
3 years ago
Please answer asap if u know the answer!!!! completing a square. thank you!!!!
Tema [17]

Answer:

D

Step-by-step explanation:

The equation of a parabola in vertex form is

f(x) = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

To obtain this form using the method of completing the square.

Given

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To complete the square

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= 3(x - 4)² - 48 + 10

= 3(x - 4)² - 38, thus

f(x) = 3(x - 4)² - 38 ← in vertex form

3 0
4 years ago
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