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2 years ago

6x+1/2xy=3 please help im confused

2 answers:

6 0

6x+ (1/2x)(y)=3

Step 1: Factor out variable x.
x (y+12/2)=3

Step 2: Divide both sides by (y+12/2.

x(y+12/2) 3
------------- = ---------
y+12 y+12
----------- ----------
2 2

Then your answer would be 6
x= ---------
y+12

Dafna11 [192]2 years ago

3 0

Hey there,

y = 90 + -45x + -10x2 + 5x3

-6x + -3x = -9x y = 5(18 + -9x + 1x2 + -3x2 + x3) (-2 + x) * (3 + x) y = 5(-2(3 + x) + x(3 + x))(-3 + x) y = 5((3 * -2 + x * -2) + x(3 + x))(-3 + x) y = 5((-6 + -2x) + x(3 + x))(-3 + x) y = 5(-6 + -2x + (3 * x + x * x))(-3 + x) y = 5(-6 + -2x + (3x + x2))(-3 + x)

y = 90 + -45x + -10x2 + 5x3=
 10 15

115+-45=70

X=70

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7 0

3 years ago

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Use the discriminant to determine the number of solutions to the quadratic equation 3x^2+5x=-1

kari74 [83]

Answer:

Two real distinct solutions

Step-by-step explanation:

Hi there!

Background of the Discriminant

The discriminant $b^2-4ac$ applies to quadratic equations when they are organised in standard form: $ax^2+bx+c=0$ .

All quadratic equations can be solved with the quadratic formula: $x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}}$ .

When $b^2-4ac$ is positive, it is possible to take its square root and end up with two real, distinct values of x.

When it is zero, we won't be taking the square root at all and we will end up with two real solutions that are equal, or just one solution.

When it is negative, it is impossible to take the square root and we will end up with two non-real solutions.

Solving the Problem

$3x^2+5x=-1$

We're given the above equation. It hasn't been organised completely in $ax^2+bx+c=0$ , but we can change that by adding 1 to both sides to make the right side equal to 0:

$3x^2+5x+1=0$

Now that we can identify the values of a, b and c, we can plug them into the discriminant:

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Therefore, because the discriminant is positive, the equation has two real, distinct solutions.

I hope this helps!

4 0

3 years ago

Elizabeth ran 2.7 kilometers in the morning and 2.52 kilometers after lunch. Adrian ran 3.064 kilometers at night. How much fart

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Answer:

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3 years ago

Tamika went hiking with her friends. The beginning of -1 feet. The highest elevation on hiking path is 100 feet. What is the dif

const2013 [10]

hello!

so the difference is 101 and here is why!

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3 years ago

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What value of x satisfies the equation below? 12 ( x - 2 ) + 3 x = 1 2 ( x + 6 ) + 2

Sergeu [11.5K]

Answer:

x = 32.6666667

Step-by-step explanation:

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2 years ago