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galina1969 [7]
4 years ago
12

X to the second-8x+7=0

Mathematics
2 answers:
guajiro [1.7K]4 years ago
7 0
Answer to this equation is x=1 and x=6 Im not to sure!
Rufina [12.5K]4 years ago
4 0
If your'e looking to complete the square, then here's how you do it:
1.) Subtract 7 from each side: x^{2} -8x=-7
2.) Take half of the value of B, which is 4, then square it to get C
3.) Now you should have x^{2} -8x+(4)^2=-7+(4)^2, because what you do to one side you have to do to the other
4.) Take the value of x^{2} and 4, and plug them into an ordered pair: (x-4)^2=9
Now take the square root of both sides which is equal to x-4=±3
5.) Now subtract 4 from each side to isolate x: x=4<span>±3
6.) Solve: </span>x=4-3 & x=4+3
Final Answer: x=1 & x=7
Hope this helps!!
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Subtract <br><br> a2-b2 from a2 +b2 <br>​
lisabon 2012 [21]

Answer:

2b^2

Step-by-step explanation:

according to the question equation is

(a^2 + b^2 ) - (a^2 - b^2)

a^2 + b^2 - a^2 + b^2

plus a square and minus a square gets cancel

b^2 + b^2

since they are like terms they can be added

2b^2

3 0
3 years ago
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What is bigger 3/10 or 3/8
olasank [31]
3/8 is bigger than 3/10. In maths 10ths are smaller than 8ths. If both have three parts it means that 3/8 must be bigger
7 0
4 years ago
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Find the distance between points M and N. and if anyone could kinda explain how they got it so i can do the next ones on my own
WINSTONCH [101]

Answer:

\sqrt{13} = D

Step-by-step explanation:

Method #1

We can draw a <em>right triangle</em> on the graph upon where the points are located and use the Pythagorean Theorem:

{a}^{2} + {b}^{2} = {c}^{2}

{3}^{2} + {2}^{2} = {c}^{2}

9 + 4 = {c}^{2}

13 = {c}^{2}

\sqrt{13} = c

* Whenever we talk about distance, we ONLY want the NON-NEGATIVE root.

_______________________________________________

Method #2

We can use the Distance Formula:

\sqrt{[-x_1 + x_2]^{2} + [-y_1 + y_2]^{2}} = D

<em>N</em>[−3, 2] <em>M</em>[−6, 0]

\sqrt{[3 - 6]^{2} + [0 + 2]^{2}} = D

\sqrt{[-3]^{2} + 2^{2}} = D

\sqrt{9 + 4} = D

\sqrt{13} = D

* Whenever we talk about distance, we ONLY want the NON-NEGATIVE root.

** You see? It does not matter which method you choose, as long as you are doing the work correctly.

I am delighted to assist you anytime.

4 0
3 years ago
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Hi! I could really use some help :)
Alekssandra [29.7K]

Answer:

A=330

Step-by-step explanation:

im not sure which is the length width height

but if length is 10

width is 3/5

height is 15

A=2(wl+hl+hw)=2·(0.6·10+15·10+15·0.6)=330

then the area would be 330

8 0
3 years ago
Fiona draws a circle with a diameter of 14 meters. What is the area of Fiona’s circle?
Arte-miy333 [17]

Answer:

A ≈ 153.94 meters

Step-by-step explanation:

area area equals pi r squared. radius is half of the diameter. Half of 14 meters is 7 meters.

7 meters pi r squared is about 153.94 meters.

that would be my answer

4 0
3 years ago
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