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3 years ago

Using the quadratic formula to solve 4x^2-3x + 9=2x + 1 what are the values of x

Mathematics

1 answer:

Alchen [17]3 years ago

8 0

Answer:

x=5±√−103/8

Step-by-step explanation:

There's no real solutions

4x2−3x+9−(2x+1)=2x+1−(2x+1)

4x2−5x+8=0

x=−b±√b2−4ac/2a

x=−(−5)±√(−5)2−4(4)(8)/2(4)

x=5±√−103/8

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the sum of two numbers is-5.When twice the first number is added to the second number the result is -2,find the two numbers

juin [17]

Answer:

Step-by-step explanation:

First write the question as an equation

x+y = -5

2x+y = -2

From the given equations, we can create a third one.

x+y+2x+y = -7 or 3x+2y = -7

Use trial and error method for the possible values x and y

We know that at least one of these two have to be negative.

x can be 1, in which case y has to be 5.

Check this for

x+y ≠ -5

x can be -1

Try another one where x = -1 and y has to equal -2

Check this

x+y = -5

but,

2x+y ≠ -2

Another one,

8 0

2 years ago

Read 2 more answers

Sam needs to make a long-distance call from a pay phone. With his prepaid phone card, he will be charged $1.00 to connect and $0

Mademuasel [1]

Answer: The required system of equations representing the given situation is

$y=1+0.5x\\\\y=3+0.25x$

Step-by-step explanation: Given that Sam needs to make a long-distance call from a pay phone.

We are to write a system to represent the situation.

Let x represent the number of minutes Sam talked on the phone and y represents the total amount that he paid for the call.

According to the given information,

with prepaid phone card, Sam will be charged $1.00 to connect and $0.50 per minute.

So, the equation representing this situation is

$y=1+0.5x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

Also, if Sam places a collect call with the operator he will be charged $3.00 to connect and $0.25 per minute.

So, the equation representing this situation is

$y=3+0.25x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)$

Thus, the required system of equations representing the given situation is

$y=1+0.5x\\\\y=3+0.25x$

3 0

2 years ago

X+x/7 + 1/11 (x + x/7) = 60

tatyana61 [14]

Solve for
x
x
by simplifying both sides of the equation, then isolating the variable.
Exact Form:
x
=
385
8
x
=
385
8
Decimal Form:
x
=
48.125
x
=
48.125
Mixed Number Form:
x
=
48
1
8
x
=
48
1
8

3 0

3 years ago

Read 2 more answers

The area of a rectangle is 36x – 24 square units. The length is 12. Find the width.

lutik1710 [3]

Answer:

36x - 24 / 12 = 3x-2 I think

8 0

2 years ago

Hi, i need help with these questions!

MA_775_DIABLO [31]

I hope this helps you

6 0

3 years ago

Using the quadratic formula to solve 4x^2-3x + 9=2x + 1 what are the values of x​

Using the quadratic formula to solve 4x^2-3x + 9=2x + 1 what are the values of x