2 years ago

Which expression is equivalent to 5 (3+4)? A) 15 + 20 B) 15 + 4 © 8 + 9 D) 15 + 9

Mathematics

2 answers:

insens350 [35]2 years ago

7 0

Answer:

15 + 20

Step-by-step explanation:

if it is correct then please mark as a brainlist

Eva8 [605]2 years ago

4 0

Answer:

A. 15+ 20

Step-by-step explanation:

5(3+4)

5(7)

=35

A. 15+20 = 35

35=35

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Which of the following is the complete list of roots for the polynomial function f(x)=(x^2+6x+8)(x^2+6x+13)

MrMuchimi

Answer:

Step-by-step explanation:

$f(x)=(x^2+6x+8)(x^2+6x+13)\\\\f(x)=0\iff(x^2+6x+8)(x^2+6x+13)=0\iff\\x^2+6x+8=0\vee x^2+6x+13=0\\\\x^2+6x+8=0\\x^2+4x+2x+8=0\\x(x+4)+2(x+4)=0\\(x+4)(x+2)=0\iff x+4=0\ \vee\ x+2=0\\x+4=0\qquad\text{subtract 4 from both sides}\\\boxed{x=-4}\\x+2=0\qquad\text{subtract 2 from both sides}\\\boxed{x=-2}\\\\x^2+6x+13=0\qquad\text{subtract 13 from both sides}\\x^2+6x=-13\\x^2+2(x)(3)=-13\qquad\text{add}\ 3^2=9\ \text{to both sides}\\x^2+2(x)(3)+3^2=-13+9\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\(x+3)^2=-4$

8 0

3 years ago

How to solve for x 2+9x^2=6

juin [17]

Answer:

The answer is : 2/3

Step-by-step explanation:

2+9x^2=6

9x^2 = 6 - 2

9x^2 = 4

x^2 = 4/9

x = √(4/9)

x = 2/3

4 0

2 years ago

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abruzzese [7]

The answer is A,B, and D

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2 years ago

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The sum of 3 consecutive even numbers is 42. The sum can be respresented by n+(n+2)+(n+4)=42. What does n represent?

Eva8 [605]

Answer:

Step-by-step explanation:

n+(n+2)+(n+4)=42

3n+6=42

3n=42-6=36

3n=36

n=13

13+14+15=42

6 0

3 years ago

Solve for x in the equation;3x +34x -40x=0

saveliy_v [14]

Answer:

x=0

Step-by-step explanation:

3x + 34x - 40x = 0

37x - 40x = 0

-3x = 0

x=0

5 0

3 years ago