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Norma-Jean [14]
3 years ago
12

Please help with number 20

Mathematics
1 answer:
Over [174]3 years ago
5 0

Answer:

6x

2

−3−7x

=6x

2

−7x−3

=6x

2

−9x+2x−3

=3x(2x−3)+1(2x−3)

=(2x−3)(3x+1).

Then, f(x)=0⟹2x−3=0 and 3x+1=0.

Therefore, 2x=3 and 3x−−1.

That is, x=

2

3

, x=

3

−1

.

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Answer:
emmainna [20.7K]

Let the numbers be n, n+2, n+4

Sum equals too= 13+2(n+4), which is 2n+21

a) Equation--> n+n+2+n+4= 2n+21

b) Solution--> 3n+6= 2n+21

                      => n= 15

c) Second number--> 17 (15+2)

   Third number--> 19 (15+4)

d) 15+15+2+15+4=30+21

   => 51= 51

So, the equation is true.

And pls mark me brainliesttt :)))

8 0
2 years ago
I need help fast...... marking brainiest
mario62 [17]

Answer:

Step-by-step explanation:

1 cheeseburger and 20 fries

8 0
3 years ago
Read 2 more answers
Algebra help please?
Alika [10]

Ok, basically if you want to find when both equations are equal just make them equal to each other. 0.925x^2 - 4x + 20  = -1.125x^2 + 6x + 40.

From there use algebraic steps to find out what x is ( the break - even point ).

0.925x^2 - 4x + 20 = -1.125x^2 + 6x + 40

0.855625x - 4x + 20 = 1.265625x + 6x + 40

-0.41x - 4x + 20 = 6x + 40

-4.41x + 20 = 6x + 40

20 = 10.41x + 40

-20 = 10.41x

-1.92122958694 = x

Rounded to the nearest tenth it's -1.9 = x.

Tell me if I got something wrong :)

3 0
3 years ago
10 x (150-3)=(10x150) ( _x3)
Vitek1552 [10]
I'm not sure if it's 10x or 10 times a number

5 0
3 years ago
Read 2 more answers
Estimate the answer to 65.78 + 13.43 by first rounding each number to the nearest tenth.
gizmo_the_mogwai [7]
65.8 + 13.4 =  79 .2. So the answer is c 
6 0
3 years ago
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