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sp2606 [1]
3 years ago
12

Using the quadratic formula to solve 2x2 = 4x – 7, what are the values of x? 2 plus-or-minus StartRoot 10 EndRoot i 1 plus-or-mi

nus StartRoot 10 EndRoot i StartFraction 2 plus-or-minus StartRoot 10 EndRoot i Over 2 EndFraction 1 plus-or-minus StartRoot 5 EndRoot i

Mathematics
2 answers:
grigory [225]3 years ago
8 0

Answer:

C. (Check Attached image)

Step-by-step explanation:

I'm too lasy to explain but to summarize,

- add -2x^2 to both sides

- then plug the numbers into the right places

(Google quadratic formula if you don't remember)

- solve

This post was made by the quadratic Formula gang because factoring is lame.

ioda3 years ago
7 0

Answer:

x = 1 +/- \frac{i\sqrt{10} }{2}

Step-by-step explanation:

The equation given is:

2x^2 = 4x - 7\\\\2x^2 - 4x + 7 = 0

Using quadratic formula:

x = \frac{-b +/- \sqrt{b^2 - 4ac} }{2a}

From the question:

a = 2, b = -4, c = 7

Therefore:

x = \frac{4 +/- \sqrt{(-4)^2 - 4 * 2 * 7} }{2 * 2}\\\\x = \frac{4 +/- \sqrt{(16 - 56)} }{4}\\\\x = \frac{4 +/- \sqrt{-40} }{4}\\

=> x = 1 +/- \frac{i\sqrt{10} }{2}

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I need help with this question and it’s very urgent!!!!
andreev551 [17]

Answer:

AAS

Step-by-step explanation:

8 0
2 years ago
Lydias hotel room number has three digits.The hundreds digit has a value of 40 Tens.The Tens digit is greater than 6. Which coul
stiks02 [169]

Any 3 digit number can be expressed in the form of:

(a*100)+(b*10)+(c*1)

Where a, b, c represent any natural number from 0 to 9.

We are told the hundreds number (this means a*100 in the expression above) is equal to the value of 40 tens, 40 tens is 400. Then, we know the digit in the tens is greater then 6, this means b>6 in the expression above.

So, there are multiple numbers the room number could be, namely:

400+(b*10)+(c*1)\\

where b can be 7, 8, or 9; and c can be  0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. So, there's 30 possible room numbers Lydia may be.

8 0
2 years ago
Pt.2
lina2011 [118]
The median is the middle number.

So if it’s, 5,6,7,8,11,11,15, then 8 is the median! Hope this helps!!
4 0
2 years ago
PLS GIVES <br><br> Moderate correlation definition and thank you :)
Len [333]

Answer:

Your welcomeeee  :)

Step-by-step explanation:

When two variables correlate and when the value of one increases as the value of the other decreases we say the relationship between both variables shows a negative correlation

3 0
2 years ago
9x+6-4x=4x+7 pls pls pls pls pls pls help
nikklg [1K]

9x+6-4x=4x+7

5x+6=4x+7

   -6       -6

5x=4x+1

-4x -4x

x=1

---

hope it helps

4 0
3 years ago
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