3 years ago

11. Find the roots of x2 - 8x + 4 = 0, in simplest radical form.

Mathematics

1 answer:

Art [367]3 years ago

8 0

Answer: -6=-4 or x=2,3

Step-by-step explanation:

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X + y = 152,<br><br> 8.5x + 12y = 1,656<br><br> How many hats were sold?

Elodia [21]

Answer:

x = 48 and y = 104

Step-by-step explanation:

Given equations are:

$x+y = 152\\8.5x+12y=1656$

From equation 1:

$x = 152-y$

Putting the value of y in equation 2

$8.5(152-y)+12y = 1656\\1292-8.5y+12y = 1656\\3.5y+1292 = 1656\\3.5y = 1656-1292\\3.5y = 364\\\frac{3.5y}{3.5} = \frac{364}{3.5}\\y = 104$

Now we have to put the value of y in one of the equation to find the value of x

Putting y = 104 in the first equation

$x+y = 152\\x+ 104 = 152\\x = 152-104\\x = 48$

Hence,

The solution of the system of equations is x = 48 and y = 104

The value of variable which was assumed for number of hats, is the total number of hats.

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I think you have to multiply 74*22

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4x - 20 =-44 I need the answer ASAP

Trava [24]

Answer:

x=8

Step-by-step explanation:

44-20=24

24/4=8

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Find the perimeter of a triangle with sides 2x - 3y, x2 + y and 2x + y units

Lesechka [4]

Perimeter = (2x -3y) + (x² + 7) + (2x + y)
Perimeter = 2x -3y + x² + 7 + 2x + y
Perimeter = x² + 4x - 2y + 7

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Answer: x² + 4x - 2y + 7
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See my answer to the other posting of the same question.

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