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ollegr [7]
3 years ago
14

Solve the equation using a method other than factoring. Show all your work. x² - 7x + 3 = 0

Mathematics
1 answer:
natka813 [3]3 years ago
5 0
Completing the square

7/2=3.5
3.5^2=12.25
add that to both sides
x<span>²-7x+12.25+3=12.25
factor perfect square
(x-3.5)</span><span>²+3=12.25
minus 3 both sides
(x-3.5)</span><span>²=9.25
square root both sides
x-3.5=+/-√9.25
add 3.5 to both sides
x=3.5+/-√9.25

x=3.5+√9.25 or 3.5-√9.25</span>
You might be interested in
Use a related equation that has the variable on one side. Then simplify the other side. p + 6 = 18
defon
<span>Given number = p + 6 = 1
Before answering, let us first show the solution on how to get the correct answer
=> we have p + 6 = 18, where p is a variable and 6 and 18 are integers.
=> P + 6 =118, move 6 to the right side, since we are going to move it, the value of it will be negative
=>  P = 18 – 6
=> p = 12
Thus, the answer is b. P = 12</span><span>

</span>



7 0
3 years ago
5, 0, 1,4)<br> find the midpoint of the line segment
alina1380 [7]

Answer:

From what I see as coordinates this is your answer MP=(3,2)

Step-by-step explanation:

MP= (\frac{x_1+x_2}{2})(\frac{y_1+y_2}{2})

MP= (\frac{5+1}{2})(\frac{0+4}{2}) 5+1=6  0+4=4

MP= (\frac{6}{2})(\frac{4}{2}) 6/2=3 4/2=2

MP= (3,2)

7 0
3 years ago
The temperature at 12 Noon was above zero. If it decreases at the rate of 4 degrees Per hour until midnight, at what time would
Dmitrij [34]

Answer:

I think it might be 4:00 or 5:00

Step-by-step explanation:

6 0
3 years ago
Whitney left school and drove 7 miles to meet her mother at a restaurant. Her mother left at the same time and drove 8 miles, tr
Tresset [83]

Answer:

40

Step-by-step explanation:

If Whitney was driving x speed, her mother was driving x+5. Multiply that by the distance each traveled, and you have an equation that looks like this:

8(x+5) = 7(x)

Simplify it and you get:

8x + 40 = 7x

Now solve regularly:

8x-8x + 40 = 8x - 7x

40 = 1x

40 = x

Whitney's speed: 40

Her mother's speed: 45

7 0
3 years ago
What value of B makes the expression. x² + Bx + 81 a perfect square trinomial?
Oxana [17]

Answer:

B.) 18

Step-by-step explanation:

To find the correct b value we use this formula

b² - 4ac = 0

b = What we are solving for

a = 1

c = 81

b² - 4(1)(81) = 0

b² - 324 = 0

b² = 324

b = \sqrt{324}

b = ±18

And 18 is one of the answer choices

So B.) 18 is the correct answer.

4 0
3 years ago
Read 2 more answers
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