All Answers 358181 Answers

The sum of the coefficients of the polynomial=f(1)=32

1) a = 28.9 in, b = 26.5 in , c = 21.5 in

2) In EFD, d = 48 cm , m E = 112° , f = 60 cm

3) In RST, s = 33 km , t = 24 km , m R = 48°

Number 4) you have to calculate like number 1).

"When Trilisa takes pictures, they turn out with probability 1/5. She wants to take enough pictures so that the probability of at least one turning out is at least 3/4. How few pictures can she take to accomplish this?"

The probability that a picture doesn't turn out well is 4/5.  The probability that n pictures don't turn out well is (4/5)ⁿ. Hence the probability that at least one picture turns out well is 1- (4/5)ⁿ.  Equate this to 3/4 and rearrange to find n.

Suppose f is a polynomial such that f(0) = 47 , f(1) = 32 , f(2) = -13 , and f(3)=16 . What is the sum of the coefficients of f ?

How can i say 2/ 5/7 =?

Hello Guest!

Point calculation (multiplication and division) goes one after the other from left to right.

2 / 5 = 0.4

           0.4 / 7 = \(0.0\overline{571428}\)

\(2/5=\frac{2}{5}\\ \frac{2}{5}/7= \frac{2}{5\cdot 7}=\frac{2}{35}=0,0\overline{571428}\)

2 / 5 / 7 = \(0,0\overline{571428}\)

  !

Solve each triangle. Round your answers to the nearest tenth.

Hello Mathrules! What should be solved, please?

1)

2)

3)

4)

I think using the quadratic formula, we can find what x is equal to. 

so 

x^2+1=7x

Subtract 7x from both sides

x^2-7x+1

(Notice it is in the form ax^2+bx+c) 

Apply the quadratic formula

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

You will eventually get

x=6.85410196 approx.=6.85 

Now I don't understand what do you mean what is the sum of x? 

Its reciprocal is just 1/6.85 i guess.

by the way the answer to your question is 0.75!

just because someone is asking for homework answers, does not mean they are trying to cheat. help them out

The difference of the roots of the quadratic equation\(x^2+bx+c=0\) is \(|b-2c|\).

If \(c\neq 0\), then find \(c\) in terms of \(b \).

Hello Guest!

\(-\frac{b}{2}+\sqrt{(\frac{b}{2})^2-c}-(-\frac{b}{2}-\sqrt{(\frac{b}{2})^2-c})\\ \color{blue}=2\cdot \sqrt{(\frac{b}{2})^2-c}\)

The difference of the roots is

\(2\cdot \sqrt{(\frac{b}{2})^2-c}\)

\(c\geq (\frac{b}{2})^2\ |b\in \mathbb{R}\)

  !

Amazing explanation asinus!! 

whats the sum of two and two   

well, 2 plus 2 equals 4, so sum of 4 could be 1, or 2, or 3

it couldn't be 4, because that wouldn't be sum of 4, that would be all of 4

.

If m.......... 

in other words, please do not post homework questions on the forum.

You can simply find x and calculate

Eventually, this equals 7.

However, there is a faster way. Can you find out yourself?

You are very welcome!

:P

Hmmmm...

If m...

if you're from Oceania, then it must be 5....


(this was a 1984 reference btw)

Picture? Don't like ugly latex too. It just shows that you are too lazy to post your question in good quality because you are just looking for the answer and you don't care for an explanation.