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Sever21 [200]
4 years ago
5

(Sorry forgot to put picture)

Mathematics
2 answers:
sweet-ann [11.9K]4 years ago
8 0
4x+8x+12=180
12x+12=180 (combine like terms)
12x=168 (subtract 12 from both sides)
X=14 (divide 12 from both sides)
Sliva [168]4 years ago
6 0

Answer:

D

Step-by-step explanation:

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How to solve number 1?
Archy [21]
E(x)=5(x-1)(x+2)-(x+2)^2\\\\1)\ 5(x^2+2x-x-2)-(x^2+2x\cdot2+2^2)\\=5(x^2+x-2)-(x^2+4x+4)\\=5x^2+5x-10-x^2-4x-4\\=4x^2+x-14\neq4x^2+x+1\\\\2)\ E(x)=1\ for\ E(x)=4x^2+x+1\\\\4x^2+x+1=1\ \ \ \ |subtract\ 1\ from\ both\ sides\\4x^2+x=0\\x(4x+1)=0\iff x=0\ \vee\ 4x+1=0\\x=0\ \vee\ 4x=-1\\\boxed{x=0\ \vee\ x=-0.25}

3)\ H(x)=9x^2-(2x+1)^2\\\\a.\ H(x)=(3x)^2-(2x+1)^2=[3x-(2x+1)](3x+2x+1)\\=(3x-2x-1)(5x+1)=(5x+1)(x-1)\\\\b.\ H(x)=0\\\\(5x+1)(x-1)=0\iff5x+1=0\ \vee\ x-1=0\\5x=-1\ \vee\ x=1\\\boxed{x=-0.2\ \vee\ x=1}
5 0
3 years ago
MATH HELP 20 POINTS!!!
sesenic [268]

A) Variable = x ( miles Tim walked )

B)  Tim walked X miles, Molly walked 4+x miles ( 4 more than Tim)

 Equation:  x + x+4 = 10

C) x +x+4 = 10

2x+4 = 10

2x =6

x = 3

D)

 Tim walked 3 miles, Molly walked 7 miles




8 0
4 years ago
11-3tothepowerof2+(11-3)tothepowerof2
kifflom [539]

Answer:

66

Step-by-step explanation:

11 - 9 + 8^2

11 - 9 + 64

= 66

8 0
3 years ago
HELP PLZ<br>15 or 16 <br>I am confused
Nuetrik [128]

Answer:

15. It is a function

16. It is a function

Mapping diagram is attached for reference.

Step-by-step explanation:

Mapping diagram is a set of two parallel columns.

The first column includes the 'domain'.

And the second column includes the 'range'.

A relation is a function,

if every domain (x) has only one range (y)

The given coordinates in the set form are in the form (x,y)

15.  We observe that each 'x' is attached to only one 'y'

Therefore this relation is a function.

16. We observe that here also each 'x' is attached to only one 'y'

Therefore this relation is also a function.

4 0
3 years ago
What is the area of the trapezoid?<br> 68<br> 54<br> 76<br> 108
iren [92.7K]
108 is the answer for this question
6 0
3 years ago
Read 2 more answers
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