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tekilochka [14]
3 years ago
13

Solve the equation. Check your solutions when necessary.2x² − 7x = 4

Mathematics
1 answer:
prisoha [69]3 years ago
5 0

Answer:

x= -1/2 = -0.500

x=4

Step-by-step explanation:

2x^2-7x-4=0

2x^2-8x+1x-4=0

2x(x-4)+1(x-4)=0

(2x+1)(x-4)=0

2x+1=0...2x= -1.. x= -1/2         x-4=0 .. x=4

checking the solution

2(-1/2)^2-7(-1/2)=4.....  4=4

2(4)^2-7(4)=4....... 4=4

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<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B2%20%2B%20%20%5Csqrt%7B2%20%2B%20%20%5Csqrt%7B2%7D%20%7D%20%7D%20" id="TexFormula
tatiyna
The answer is 1.961571
6 0
3 years ago
(02.01 LC)
ExtremeBDS [4]

Answer:

Yes it is a function

Step-by-step explanation:

We have to check the ordered pairs to find out if given relation is a function or not.

In an ordered pair, the first element represents the input and the second element represents the output.

The set of inputs is domain and output is range.

For a relation to be function, there should be no repetition in domain i.e there should be unique pairs of input and output.

In the given relation, the domain is {3,5,-1,-2}.

No element is repeated hence it is a function ..

7 0
3 years ago
Which equation represents the line shown in the graph below?
likoan [24]

The answer is y=2x+5


To get it use point slope by taking two points and solving .


Slope formula


M= y2-y1/x2-x1


With two points


(0,5)(-5,-5)


M= -5-5/-5-0

M= -10/-5

M=2


2 is slope


Now get one of the points

(0,5) And slope to create equation y=mx+b . Now find b


5=2(0)+b

5=b


So now you can put it all together


Y= 2x+5

3 0
3 years ago
Help a girl out ?? i'm confused as to solve this
Rom4ik [11]

Answer:

(5 1/2 miles, $12.50)

Step-by-step explanation:

Looking at the graph, identify as best you can the coordinates of the point at which the two graphs cross.  I read (5 1/2 miles, $12.50).


3 0
3 years ago
On a coordinate plane, triangle L M N has points (1, negative 1), (3, 2), and (1, 3). An altitude is drawn from point M to point
PIT_PIT [208]
The answer is 4 units.
7 0
3 years ago
Read 2 more answers
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