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krok68 [10]
3 years ago
13

The answer and how to solve it

Mathematics
1 answer:
blondinia [14]3 years ago
3 0
U would simpiphy it to then get the awnser
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How do I solve this equation and check the solutions?
IgorLugansk [536]
<h3>SOLUTION :-</h3>
  • <u>By squaring on both sides :</u>

: \implies  \sf {\big( \sqrt{20 - 8x}  \:\big)}^{2}  = x^2 \\   \\

:\implies  \sf {20 - 8x}  =  {x}^{2}  \\  \\

  • <u>Solving quadratic equation :</u>

: \implies\sf{ {x}^{2} + 8x  - 20 = 0 }   \\  \\

: \implies\sf{ {x}^{2} + (10 - 2)x -  20 = 0 }   \\  \\

: \implies\sf{ {x}^{2} + 10x - 2x -  20 = 0 }   \\  \\

: \implies\sf{ x(x + 10) - 2(x  + 10 )= 0 }   \\  \\

:\implies\sf{( x + 10 )(x - 2)= 0 } \\  \\

: \implies\sf x + 10 = 0 \:  or \: x  - 2 = 0 \\  \\

: \implies\sf x  = 0  - 10\:  or \: x  = 0  + 2\\  \\

: \implies  \underline{\boxed{ \bf{x = - 10 \: or \: x = 2}}}

\huge {\therefore} The roots of this equation are -10 and 2.

3 0
3 years ago
Read 2 more answers
If 50% of 160 is 80, what is 75% of 160?​
matrenka [14]

Answer: 120

Step-by-step explanation:

Math

8 0
3 years ago
BRAINLIEST !!!PLEASE HELP
cricket20 [7]

Marcella would not be able to win the competition because her kite string (159.75 feet) is less than 162 feet.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

Let l represent the length of the string, hence:

sin(28) = 75/l

l = 159.75 feet

Marcella would not be able to win the competition because her kite string (159.75 feet) is less than 162 feet.

Find out more on equation at: brainly.com/question/2972832

#SPJ1

6 0
2 years ago
ILL GIVE BRAINLIEST IF UPU ANSWER ALL AND GOOD PLS JUST HELP I FOR GOT
Natali5045456 [20]
10)
variable : cost of 1 square foot flooring = x

equation :
60x + 80 = 287
60x = 287 - 80
x = (287-80) / 60

11)
variable : doughnut cost = d

equation :
3(1.25) + 6d = 6.90
3.75 + 6d = 6.90
6d = 6.90 - 3.75
d = (6.90 - 3.75) / 6

12)
variable : smaller number = x

equation :
x + x + 1 = -29
2x + 1 = -29
2x = -29 - 1
x = (-29 - 1) / 2

13)
variable : number of shrubs : n

eqution :
n(25) + 110 = 260
25n = 260 - 110
n = (260 - 110) / 25
5 0
3 years ago
Freeeeeeeeeeee pointttttttttssss!!!!
Aleks [24]

Answer:

Thank you  for the free points

Step-by-step explanation:

8 0
3 years ago
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