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saveliy_v [14]
1 year ago
9

Solve the quadratic equation by completing the square. x²+18x+79=0

Mathematics
1 answer:
pogonyaev1 year ago
8 0

x^2 + 18x=-79 \\ \\ x^2 + 18x+81=2 \\ \\ \boxed{(x+9)^2=2} \\ \\ x+9=\pm \sqrt 2 \\ \\ x=-9 \pm \sqrt{2} \\ \\ \boxed{x=-9+\sqrt{2}, -9-\sqrt{2}}

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Sunday by 11:59pm
beks73 [17]

Answer:

The amount of markup is 88 dollars.

Step-by-step explanation:

Given that the whole sale price of bicycle is: $400

P = \$400

Mark up is the profit that the seller of the product makes after selling the product more in price more than its cost or buying price.

Given that mark up percentage is 22%

It can be written mathematically as:

Mark\ up = 22\%\ of\ Price\\Mark\ up = 0.22 * P\\Mark\ up = 0.22 * 400\\= \$88

Hence,

The amount of markup is 88 dollars.

7 0
3 years ago
Plz help fast fast plz plz plz divide 44/625 and 220/31.25
Irina-Kira [14]

the answer to 44/625 is0.0704

the answer to 220/31.25 is 7.04

7 0
3 years ago
Read 2 more answers
I need help for a project! What would the variables be defined as!?
Mila [183]

2  1/5x * 1 7/10 y  *  4  3/5 x 1 7/10  (* 7 4/50)

Finds the answer  

10 6/50x  *  7  41/50y   (* 7/4/50)  = 56

79 13/100  (* 7 4/50)  = 56

560  = 56 (10x)

x = 5 6/10

7 (y) = 56 (7y)

8 = 56/7  (y)

y = 8

x = 5 6/10

6/10 of 560  = 336  

336/60 = x

336/60 = 5 6/10

6 0
3 years ago
Five more than the quotient of y and 2 is -3
Tresset [83]

Answer:

y/2 + 5 = -3

y/2 = -8

y = -16

Step-by-step explanation:

8 0
3 years ago
Im trying to figure out how to find the length of an equilateral triangle
gulaghasi [49]

All 3 sides of an equilateral triangle are the same.

Set up an equation with two sides equaling each other and solve for n:

2n +15/4 = 7n

Subtract 2n from both sides:

15/4 = 5n

Divide both sides by 5:

n = (15/4) / 5

n = 3/4

Now you have a value for n, replace n and solve for the length:

7n = 7(3/4) = 21/4 = 5 1/4

Each side is 5 1/4

7 0
3 years ago
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