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Vlada [557]
3 years ago
9

Simplify the expression: x2+x(x-5)-x+7

Mathematics
1 answer:
exis [7]3 years ago
3 0
So to solve this equation we need to simplify the expression like so,
First write out the equation (I assume that you mean x2 as 2x)
2x+x(x-5)-x+7
Distribute
2x+x^2-5x-x+7
Combine like terms
-4x+x^2+7
And thats it! Enjoy!=)
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What is the least common multiple of 156 and 321
jekas [21]

Hello  Hdolly81

<u><em>The LCM of 156 and 321 is 16692</em></u>

Backup:

156: 2,2,3,13,

321: 3,107

2 * 2 *  3 * 13 * 107 = 16692

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5 0
3 years ago
Find the value of x for which d ||m.
Agata [3.3K]

Answer:

29

Step-by-step explanation:

4 0
2 years ago
Solve each system using substitution or elimination. Show all required work. X^2+y^2=40 -x+y=-8
mr_godi [17]

Answer:

steps and answers in the pic..hope u can understand the calculations...

4 0
3 years ago
What value of x makes the equation −2x−(−5−4x)=−5(2x−7) true?
Anestetic [448]

Answer:

-2x - (-5 - 4x) = -5(2x - 7)

-2x + 5 - 4x = -5 * 2x - 5 * (-7)  

-6x + 5 = -10x - 35

-6x + 5 + 10x = -10x - 35 + 10x

4x + 5 = -35

4x + 5 - 5 = -35 - 5

4x = -40

4x/4 = -40/4

x = 10  

Step-by-step explanation:

3 0
2 years ago
In the figure below, ∠DEC ≅ ∠DCE, ∠B ≅ ∠F, and segment DF is congruent to segment BD . Point C is the point of intersection betw
Rzqust [24]

Answer:

Step-by-step explanation:

Given:

∠DCE ≅ ∠DEC

∠B ≅ ∠F

DF ≅ BD

To prove:

ΔABC ≅ ΔGFE

Solution:

                  Statements                            Reasons

1). ∠DCE ≅ ∠DEC                                1). Given

2). ∠ACB ≅ ∠GEF                               2). Vertically opposite angles to the

                                                                 congruent angles.

3). ∠B ≅ ∠F                                         3). Given

4). DB ≅ DF                                         4). Given

5). DC + CB ≅ DE + EF                       5). Segment addition postulate

6). DC ≅ DE                                        6). Property of isosceles triangle

7). CB ≅ EF                                         7). Transitive property

8). ΔABC ≅ ΔGFE                              8). ASA property of congruence

4 0
3 years ago
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