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ANEK [815]
2 years ago
14

If B is the midpoint of AC, AC= CD, AB=3x+4, AC= 11x-17, and CE= 49 , find DE

Mathematics
1 answer:
melisa1 [442]2 years ago
4 0

Answer:

Ehhh

Step-by-step explanation:

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Which is a zero of the quadratic function f(x)=9x^2-54x-19?
Arturiano [62]
A zero, or a solution of the quadratic function is c) x = 6 1/3


Write -54x as a difference
9x^2 + 3x - 57x - 19

Factor 3x out
{ 9x^2 + 3x }  - 57x - 19
3x (3x + 1)

Factor -19 out
3x (3x + 1) -19 (3x + 1)

Group the equations
( 3x - 19 ) ( 3x + 1 )

Solve for the zeroes

(3x+1) = 0
     -1     -1
3x = -1
3x / 3 = x
-1 / 3 = -1/3
x = - 1/3

(3x - 19) = 0
      +19   +19
3x = 19
3x / 3 = x
19 / 3 = 6 1/3
x = 6   1/3

8 0
2 years ago
Just need some help with the second answer thanks :)
vazorg [7]

Answer:

4,151,347,200

Step-by-step explanation:

To find how many ways the train can be made up we use the permutation formula and the values given.

n = 16

k = 9

_{n}P_{k}=\dfrac{n!}{(n-k)!}

_{16}P_{9}=\dfrac{16!}{(16-9)!}

_{16}P_{9}=\dfrac{16!}{7!}

_{16}P_{9}=4,151,347,200

So there will be 4,151,347,200 different ways that the train can be made.

5 0
3 years ago
Which equation has no solution?
zvonat [6]

Answer:

the awnser is B

Step-by-step explanation:

the awnser is B

7 0
3 years ago
Read 2 more answers
Someone pls help me I'm stuck on this question!!!!????
Iteru [2.4K]
What’s the questions
5 0
3 years ago
A second-order linear differential equation for y(t) is said to be homogeneous if... every term involve either y or its derivati
swat32

Answer: Hello!

A second order differential equation has the next shape:

y''(t) + p(t)y'(t) + q(t)y(t) = g(t)

where p(t), q(t) and g(t) are functions of t, that can be constant numbers for example.

And is called homogeneus when g(t) = 0, so you have:

y''(t) + p(t)y'(t) + q(t)y(t) = 0

Then a second order differential equation is homogeneus ef every term involve either y or the derivatives of y.

4 0
3 years ago
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