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djyliett [7]
3 years ago
6

Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x

^2+12x. What is the value of a?
Mathematics
1 answer:
Julli [10]3 years ago
6 0

Answer:

a = 9

Step-by-step explanation:

First we need to add  (x^2+3x)  to (3x^2+ax),

(x^2+3x)+(3x^2+ax)

Expand

= x^2+3x+3x^2+ax

Collect the like terms

= x^2+3x^2+3x+ax

= 4x^2 + 3x + ax

= 4x^2+(3+a)x

Equate the solution to 4x^2+12x

4x^2+(3+a)x = 4x^2+12x

Comparing the like terms on both sides

(3+a)x =12x

3 + a = 12

a = 12 - 3

a = 9

Hence the value of a is 9

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Step-by-step explanation:

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A square is a quadrilateral with all four angles right angles and all four sides of the same length. So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus every square is a rectangle because it is a quadrilateral with all four angles right angles.

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3 years ago
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3 years ago
A truck hauls wheat to a storage granary. It carries a total of 4,970 bushels of wheat in 14 trips. How much does the truck haul
Alex17521 [72]

Answer:

355 bushels.

Step-by-step explanation:

To know the amount of wheat the truck hauls each trip, we need to divide the total amount of bushels of wheat  between the total of trips of the truck.

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Then, the amount of bushels for each trip would be 4970/14 = 355.

Therefore, the truck hauls 355 bushels of wheat each trip.

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Janae bought a new house. The house is quite large, 2500 square feet, and has a nice sized backyard. She bought the house on a f
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Solution :

Rephrasing is defined as to rewriting or expressing the idea or the content in an alternative way.

So rephrasing the question, we get :

Janae bought a new big size house of 2500 square feet with a large size backyard at $ 129,900. Janae wants fence her backyard so that her dog, Lyle can play on the backyard. Before fencing she wants to know the perimeter of the fencing or the size of the yard so that she could fence it. The measures of her yard is :

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Brainliest to right answer
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Answer:

Here

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the overall equation would be

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3+1=4

4-3=1

The Answer is 1

8 0
3 years ago
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