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Juli2301 [7.4K]
2 years ago
13

Find the solutions to the quadratic equation below by completing the square. x2 - 8x - 7 = 0

Mathematics
1 answer:
Furkat [3]2 years ago
3 0

Answer:

x=4-\sqrt{23}, x=4+\sqrt{23}

Step-by-step explanation:

(x^2-8x+16)-16-7=0

(x-4)^2=23

x=4-\sqrt{23}, x=4+\sqrt{23}

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Answer this...:<br> ab=?
Andrej [43]

Answer:

I don't know

thanks for points

Step-by-step explanation:

a = Apple

nd

b=ball

4 0
2 years ago
HELP ASAP 25 points. Vector question
Nutka1998 [239]

Answer:

4v - 7w  = (101 , -36)

6u -8v = (-78 , 58)

2u +v - 4w = (40 , -4)    

11u + 3w = (-88 , 89).

Step-by-step explanation:

u(-5, 7) ; v(6 , -2) ;   w(-11,4)

4v - 7w = (4*6+[-7]*[-11] , 4*[-2] + [-7]*4)

            =(24+77 , -6 - 28)

4v - 7w  = (101 , -36)

6u - 8v = (6*[-5]+[-8]*6 , 6*7+[-8]*[-2] )

            = (-30-48 , 42+16)

6u -8v = (-78 , 58)

2u + v - 4w = (-10+6+44 , 14 -2 -16)

2u +v - 4w = (40 , -4)                  

11u + 3w = (11*[-5]+3*[-11]  ,  7*11 +3*4)

             = (-55-33 , 77+12)

11u + 3w = (-88 , 89)

5 0
3 years ago
There are mangoes and oranges in a basket in the ratio 7: 11. If the total number of fruits is 720, then how many mangoes are th
lbvjy [14]

Answer:

280 mangoes

Step-by-step explanation:

sum the parts of the ratio, 7 + 11 = 18 parts

Divide the total by 18 to find the value of one part of the ratio.

720 ÷ 18 = 40 ← value of 1 part of the ratio , then

7 × 40 = 280 ← number of mangoes

8 0
2 years ago
Read 2 more answers
Store A
MArishka [77]
<h3>Answer: Choice C) $1,444.50</h3>

========================================================

There are two methods to get the answer.

The slightly longer method is to take 7% of the original price to get

7% of 1350 = (7/100)*1350 = 0.07*1350 = 94.50

The sales tax is $94.50

Add this onto the original price to get 1,350+94.50 = 1,444.50

----------------------------

A shortcut is to multiply the original price by 1.07

The multiplier 1.07 represents a 7% increase since

  • 1 = 100%
  • 0.07 = 7%
  • 1.07 = 1 + 0.7 = 100% + 7%

So we will have 1.07*1350 = 1,444.50

4 0
3 years ago
The graph of a linear function is shown.
Leokris [45]

Answer:

zero

Step-by-step explanation:

because it's horizontal line

6 0
2 years ago
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