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emmasim [6.3K]
2 years ago
14

HELP MEEEEEEEE PLZZZZ

Mathematics
1 answer:
Artyom0805 [142]2 years ago
8 0
256.5 cm2 / 27 cm2 = 9.5cm
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Solve by completing the square.
enot [183]

Answer:

x^2 -8x -5 = -3

x^2 -8x -2 = 0

We complete the square by:

1) Moving the "non X" term to the right:

x^2 -8x  = 2

2) Dividing the equation by the coefficient of X²

The coefficient of x is 1 so we don't do anything

3) Now here's the "completing the square" stage in which we:

      • take the coefficient of X

that is -8

     • divide it by 2

-8 ÷ 2 = -4

     • square that number

-4*-4 = 16

     • then add it to both sides of the  equation.

x^2 -8x +16 = 2 +16

That becomes

(x -4)^2 = 18

we take the square root of both sides:

(x -4) = sqr root (18)

x1 = sqr root (18) +4

AND

(x+4) = sqr root (18) -4

x1 =  sqr root (18) +4 = 4.2426406871  + 4 = 8.2426406871

x2 = sqr root (18) -4 =  = 4.2426406871  - 4 = .2426406871

       

Step-by-step explanation:

8 0
3 years ago
What is the quotation of -3/8 and -1/3
horrorfan [7]

Answer: A slash in between the numbers you put

Step-by-step explanation:

8 0
1 year ago
Read 2 more answers
Find the value of x in x+y=8 and x-y=6
Diano4ka-milaya [45]

Answer: x=-y+8 and x=y+6

Step-by-step explanation:

7 0
3 years ago
Solve the system of linear equations by graphing.<br><br> y=2x−3<br> y=x+2
Musya8 [376]

Step-by-step explanation:

y=2x−3

y=x+2

y=-3

x=3/2

for the second line

y=2

x=-2

7 0
3 years ago
Calculate the percentage increase for the price of a book increasing from 250 to 275.50​
Naddika [18.5K]

Step-by-step explanation:

increase in price=275.50-250

=75 .50

now,in precent

( increase in price÷initial price )×100%

=(75.50÷250) ×100%

= 30.2%

6 0
2 years ago
Read 2 more answers
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