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3 years ago

11

I believe the answer is b is this correct?

2 answers:

zhuklara [117]3 years ago

6 0

Answer:b

Step-by-step explanation:

alexandr402 [8]3 years ago

3 0

Yes,the answer is B

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user100 [1]

Answer:

{(2, 8), (3, 5), (3,0)}

Step-by-step explanation:

6 0

3 years ago

Solve the simultaneous equation y-2x+1=0 and 4x^2+3y^2-2xy=7

Lapatulllka [165]

The first equation is $y-2x+1=0$

$y=2x-1$ (Equation 1)

The second equation is $4x^{2}+3y^{2}-2xy=7$ (Equation 2)

Putting the value of x from equation 1 in equation 2.

we get,

$4x^{2}+3(2x-1)^{2}-2x(2x-1)=7$

$4x^{2}+3(4x^{2}+1-4x)-4x^{2}+2x=7$

by simplifying the given equation,

$12x^{2}-10x-4=0$

$6x^{2}-5x-2=0$

Using discriminant formula,

$D=b^{2}-4ac$

$D=25-4 \times 6 \times -2 = 73$

Now the formula for solution 'x' of quadratic equation is given by:

$x=\frac{-b+\sqrt{D}}{2a} and x=\frac{-b-\sqrt{D}}{2a}$

$x=\frac{5+\sqrt{73}}{12} and x=\frac{5-\sqrt{73}}{12}$

Hence, these are the required solutions.

8 0

3 years ago

How did you get 40 as the answer

SSSSS [86.1K]

What is the question?

7 0

4 years ago

Simplify (-36x)(-1/3)(2/9)(-4y)

den301095 [7]

Answer:

$\frac{32xy}{3}$

Step-by-step explanation:

3 0

4 years ago

Gary bought 32 lb of potting soil this week this amount is 6 lb more than twice the amount of potting soil he bought last week a

lys-0071 [83]

Let the amount of potting soil bought last week be $x$

We know that this week's amount is 32 lb
We also know that this week's amount is double the amount of last week's plus 6 lb

So we write the equation:
$32 = 2x+6$

Solving this equation:
$32=2x+6$ ⇒ subtracting 6 from both sides
$32-6=2x+6-6$
$26=2x$ ⇒ Dividing both sides by 2
$\frac{26}{2}= \frac{2x}{2}$
$13=x$

The answer is: 13

4 0

3 years ago