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Kruka [31]
3 years ago
12

What’s the disturbutive property when solving -4(-1.5 - 9)

Mathematics
1 answer:
Bad White [126]3 years ago
4 0
-4(-1.5 - 9)
-4 x -1.5 = 6
-4 x 9 = -36 
Answer is -30
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Step-by-step explanation:

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A plumber charges $50 to come to a house and $20 an hour for work time.
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Since the 50 remains the same every time, is has no letters next to it in the equation.  The 20, however, is multiplied by the amount of hours, and will therefore have an h next to.  

20h + 50- the answer is a. 
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the British Thermal Unit(BTU) is a unit of energy used globally in air conditioning industries. the number of BTUs needed to coo
7nadin3 [17]

Answer:

<em>32.5 m^2</em>

Step-by-step explanation:

B = 377lw

I will use L for length instead of l.

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4 0
3 years ago
Find the constant $a$ such that\[(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28.\]
Colt1911 [192]

The value of constant a is -5

Further explanation:

We will use the comparison of co-efficient method for finding the value of a

So,

Given

(x^2 - 3x + 4)(2x^2 +ax + 7)\\= x^2((2x^2 +ax + 7)-3x((2x^2 +ax + 7)+4(2x^2 +ax + 7)\\= 2x^4+ax^3+7x^2-6x^3-3ax^2-21x+8x^2+4ax+28\\Combining\ alike\ terms\\=2x^4+ax^3-6x^3+7x^2-3ax^2+8x^2-21x+4ax+28\\= 2x^4 +(a-6)x^3+(15-3a)x^2-(21-4a)x+28\\

As it is given that

(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28

In this case, co-efficient of variables will be equal, so we can compare the coefficients of x^3, x^2 or x

Comparing coefficient of x^3

a-6 = -11\\a = -11+6\\a = -5

So the value of constant a is -5

Keywords: Polynomials, factorization

Learn more about factorization at:

  • brainly.com/question/1414350
  • brainly.com/question/1430645

#LearnwithBrainly

4 0
3 years ago
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