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fomenos
4 years ago
6

7(3x - 1) - (x + 5) = -52​

Mathematics
2 answers:
djverab [1.8K]4 years ago
7 0

Step-by-step explanation:

7(3x - 1) - (x + 5) = -52

21x - 7 - x - 5 = -52

20x = -52 + 12

20x = -40

x = -2

Kruka [31]4 years ago
4 0

Answer:

x=-2

Step-by-step explanation:

21x-7-x-5=-52

20x-12=-52

20x=-40

x=-2

You might be interested in
The area of the triangle is 5.88 square centimeters.what is the length of the base.the heights is 2.1
Bas_tet [7]

Answer:

base = 5.6 cm

Step-by-step explanation:

area of a triangle = 1/2 * base * height

area = 5.88 cm²

height = 2.1 cm

5.88 = 1/2 * base * 2.1

5.88 = 1.05 base

5.88 / 1.05 = base

base = 5.6 cm

4 0
3 years ago
Which operation between two polynomials will not always result in a polynomial?
Assoli18 [71]
In order to build a polynomial we need one or more terms. A term is a number, variable (denoted by a letter) or any combination of numbers and variables held together by multiplication. The following are examples of terms:

5, 3x, -5ab c^{2},  \frac{2x^{3}y }{5},  x^{6}

Now it might look like one of those involves division but it can be thought of as multiplication by (2/5). When we do this the exponents must be positive.

Polynomials are expressions made up of terms held together by addition and subtraction. Again, the exponents must be positive. Since polynomials are made up of the sum or difference of terms, adding or subtracting polynomials just leads to more polynomials. Here are some examples of Polynomials:

4xy-3 x^{2} +7,  \frac{2x}{5}-3abc-5j

Now let’s consider what happens if we multiply polynomials. As an example we use: (x+5)(2x-y)=2 x^{2} +10x-xy-5y

What you might notice is that multiplication will lead us to multiply terms (but multiplying terms gives us more term,as) and also to add or subtract terms but that just gives more polynomials. Therefore multiplication leads to more polynomials.

Finally, we consider division. Here a simple example will do the trick: 2 is a term and x is a term. Let us divide 2 by x. We get: \frac{\2}{x}=2 x^{-1}  which is not a polynomial because we have a negative exponent. 

Thus, the answer to your question is division. Division of polynomials will not always result in a polynomial.

_______END OF ANSWER___________
 is. 
5 0
3 years ago
Solve this plz
frozen [14]

A) 9(x + 4) = 27

9x + 36 = 27

9x = 27 - 36

9x = -9

x = -9 ÷ 9

x = -1

B) x/3 - 5 = 6

x/3 = 6 + 5

x/3 = 11

x = 11 × 3

x = 33

C) 15 + 3 ( x -7 ) = -30

15 + 3x - 21 = -30

3x + 15 - 21 = -30

3x - 6 = -30

3x = -30 + 6

3x = -24

x = -24 ÷ 3

x = -8

5 0
3 years ago
Read 2 more answers
The variable Z is directly proportional to X. When X is 3, Z has the value 57. What is the value of Z when X = 8
Olin [163]
When x = 3 z = 57 57/3 = 19
19*8 = 152
So when X is equal to 8, Z is equal to 152.
5 0
3 years ago
Jamaal is allowed to walk no farther than three blocks in either direction from his house. If his house is located on the 57th b
Anna71 [15]

Answer:

|x – 57| = 3

Step-by-step explanation:

<u><em>let x be the farthest block to which Jamaal is allowed to walk.</em></u>

the statement “Jamaal is allowed to walk

no farther than three blocks in either direction from his house.”

<u><em>means</em></u>

the distance between the 57th block and the farthest block = 3

<u><em>means</em></u>

|x – 57| = 3

3 0
2 years ago
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