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Vedmedyk [2.9K]
3 years ago
15

A. 6.3 B. 4.5 C. 7.2 D. 5.4

Mathematics
1 answer:
Nitella [24]3 years ago
7 0
The answer is D. 5.4
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Find the sum: (3x^2+2x+3)+(x^2+x+1)
elena-s [515]

Answer:

 4x2 + 3x + 4

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant   4 • 4 = 16

Step-2 : Find two factors of  16  whose sum equals the coefficient of the middle term, which is   3 .

-16+-1=-17

-8+-2=-10

-4+-4=-8

-2+-8=-10

-1+-16=-17

1+16=17

2+8=10

4+4=8

8+2=10

16+1=17

Final result :

4x2 + 3x + 4

3 0
3 years ago
What are the values of x and y in the figure shown below?
n200080 [17]
First let's find y. We know the sum of angles equals 180, so if we add the angles of ABC, we'd get 180.
30+y+80+y=180
110+2y=180
2y=70
y=35

You could solve x ,but the only response with y=35 is c. But to solve for x, you'd ad 35 35 and xwhich would equal 180.
35+35+x=180
70+x=180
x=110
5 0
3 years ago
According to the fundamental theorem of algebra, how many roots exist for the polynomial function? F(x) =4x^5-3x
tangare [24]

Answer: x(4x

​4

​​ −3)

Step-by-step explanation:

GCF = xx

x(

​x

​

​4x

​5

​​  

​​ +

​x

​

​−3x

​​ )

x(4x

​4

​​ −3)

8 0
3 years ago
Read 2 more answers
HURRY!!!:) Find the sum of (7x+4) and the opposite of 7x.
jeka57 [31]

Answer:

  • 4

Step-by-step explanation:

<u>Sum of (7x+4) and the opposite of 7x:</u>

  • 7x + 4 + (-7x) =
  • 7x + 4 - 7x =
  • 4
7 0
2 years ago
[50 POINTS]
Zina [86]
A^2 + 2AB + B^2 = (A + B)^2 ==>

16X^2 + 40X + 25 = 
= (4X)^2 + 2*4*5X + 5^2 = 
= (4X + 5)^2 

<span>(4x + 5)(4x + 5)</span>
5 0
3 years ago
Read 2 more answers
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