I need some help with it. Can someone please explain how I can get the correct answer?

I have a picture of what I've been doing on paper and a screenshot of the website explaining the problem to me.

Feel free to look at it, and give me some feedback and guidance. Thank you all.

Can someone help me with the following problem:

Sorry for my English. It isn't good enough to describe math problems but I did my best. I made a drawing and I hope that you will understand me. I've thought for two hours but I can't understand how to solve it.

geogebra1.jpg

The equation is: (4+2i)(A+B)=6+7i

The question asks to multiply out the let hand side of the complex equation, obtain equations for A and B and thus find the values for them.

Because it involves complex numbers I'm finding it hard to solve. Any help will be fantastic

Thank you ]]>

3x + y = 23 ]]>

I've joined this forum in hopes that i can improve my mathematics skills. I've always lacked them and had no need for advanced (advanced to me lol) maths, untill now.

I have an exam for a serious job im applying for and ive purchased the practice exams to study. I've reached a point where i have absolutely no idea where to start my calculations.

Ill attach the image of the question.

Please don't tell me the answers, only the basic formula i need to use to calculate the 2 questions. Im sure this is baby maths for some people, but for me its not.

Thank you for reading and your assistance in advance.

Alex

]]>

- What are the
*x*-intercepts of*y*=(*x*−2)(*x*+5) ?

- A. (0, 2) and (0, -5)
- B. (0, -2) and (0, 5)
- C. (-2, 0) and (5, 0)
- D. (2, 0) and (-5, 0)

answer is D

X-2=>

X=2 (2,0)

X+5=0

X=-5 (-5,0)

Correct or not

- Which of these quadratic functions has exactly one
*x*-intercept?

- A.
*y*=*x*2 −9 - B.
*y*=*x*2 −6*x*+9 - C.
*y*=*x*2 −5*x*+6 - D.
*y*=*x*2 +*x*−6

MY ANSWER IS

A

(X-#)(X+3)

CORRECT OR NOT

- Which of the following parabolas opens upward and appears narrower than
*y*=−3*x*2 +2*x*−1 ?

- A.
*y*= 4*x*2 −2*x*−1 - B.
*y*= −4*x*2 +2*x*−1 - C.
*y*=*x*2 +4*x*

D.

MY ANSWER IS

A

CORRECT OR NOT

THANKS MUCH ]]>

- In
*y*=*a*(*x*−*h*)**^**2 +*k*, what does the value of*h*tell you about the parabola?

- A. the
*y*-coordinate of the vertex - B. the
*x*-coordinate of the*x*-intercept - C. the
*x*-coordinate of the vertex - D. the
*y*-coordinate of the*y*-intercept

my answer was

A ?

CORRECT OR NOT?

- How does the graph of
*y*=3(*x*−4)**^**2 compare to the graph of*y*=3*x***^**2 ?

- A. It is shifted 4 units up.
- B. It is shifted 4 units down.
- C. It is shifted 4 units to the right.
- D. It is shifted 4 units to the left.

MY ANSWER

C?

CORRECT OR NOT

- Which of these functions has a maximum
*y*-value of 2?

- A.
*y*=2(*x*+1)**^**2 +3 - B.
*y*=3(*x*+1)**^**2 +2 - C.
*y*=−3(*x*+1)**^**2 +2 - D.
*y*=−(*x*−2)**^**2 +3

MY ANSWER IS

C?

CORRECT OR NOT

THANKS MUCH ]]>

Niki owns a small plane that has a speed if 80 km/h without any wind. in 90 minutes, Niki can fly from Virginia to her mansion on a secret island with the wind's help. coming back against the wind, it takes Niki 1 hour to cover half that distance. Find the rate of the wind in mph.

Here's my work. your help would be appreciated.

system wp.jpg

I am trying to factor the following quadratic:

It only has two terms which is really throwing me off and I am struggling with.

Can anyone help?

Also with a quadratic with 2 terms such as

or

How would you factor these types of quadratics?

Thank you. ]]>

I have found one but am not sure if there is one before it. My approach has been trial and error but feel there ought to be some kind of strategy. I am guessing the second digit 0?

Any thoughts? ]]>

This question is for my 10 year old (Year 6 in the UK).

Claire looks at some animals and counts all their legs.

She counts 38 legs.

There are twice as many birds as spiders and twice as many cats as insects.

We tried to build an equation based on the above:

b + c + i + s = 38

but for me this does not sound right because b,c,i and s will need to be total number of animals that make 38 legs?

Then we have the information where there are twice as many birds as spiders and twice as many cats as insects.

So this will make the above equation:

2s + 2i + i + s = 38

3s + 3i = 38

...i do not think i am going anywhere with this...so we tried the "manual" method

bird has two legs

cat has 4 legs

insect has 6 legs

spider has 8 legs

so at the minimum level if we add all the legs to together we get:

birds (4) + cats (8) + Insects (6) + spider (8) = 26

but we still need to get 38 i.e 38 - 26: 12 more...however we cannot see how we can get 12 more because there is a link between cats and insects, birds and spiders...if we add an insect or spider we will only go upto 36....

Any direction on this will be helpful.

saf ]]>

why am I subtracting on the first part and dividing on the second. why am I not dividing on both????

Capture.jpg

Just something I have accepted but hate that I dont really get it.

Thanks in advance hope everyone is having a great holiday!

As those of you who kindly answered my previous posts will know, I'm self studying algebra from a book called 'Teach yourself algebra: a complete introduction.' Now, all of my previous posts have been concerning specific problems, this one however, is a bit more general. I've reached the section on 'linear inequalities' and am having few difficulties in understanding the material, on one little detail however, my book is being somewhat ambiguous.

For the simultaneous inequalities that I'm required to solve in the current exercise it is clearly stated 'Find the

Now the format of the book is such that before making you solve any specific kind of problem yourself you are always given a 'worked example.'

Now my problem is that in the 'worked example' for this kind of problem 0 is not included as a positive value. The answer is given

Is is the book trying to tell me that both ways are correct and that 0 can be either considered as positive or not included at all? Or does the book contain an error here? In short, is 0 to be considered as a positive value or not in the solution of this kind of inequality problem?

My Google searches have done little to clarify the situation. They tell me that in the English speaking world 0 is considered as neither positive nor negative, but that in the minds of the French 0 can be either positive or negative.

Any clarification on this matter would be much appreciated.

Many thanks,

Tom. ]]>

This problem is from khan academy. (I am a adult, just reviewing for future qualifying test in my free time. So dont worry its not a real test.)

Equation: 2/3b+5=20-b

They say they are adding b to both sides: 2/3b+5+b=20-b+b getting: 5/3b+5=20....not sure how they got 5/3b.

Thanks in advanced. Happy holidays. ]]>

0.45 = (a - x(bcd + bce + bf)) / (a + x(bcg - bcd -bce -bf))

x = ?

I'm stuck and I need help! (I'm a 56 yo guy and school classes are very far...)

Thanks! ]]>