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Sergeu [11.5K]
3 years ago
10

8 people are about to board a plane. In how many ways can this be done?

Mathematics
1 answer:
kotykmax [81]3 years ago
8 0
The answer is D. 40,320
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I need help on these problems
VikaD [51]
Someone is writing the answer so ill just give you this tip for whenever.
A negitive times a negitive is positive
a negative times a positive is negitive
and a positive times a positive is positive (just had to add it to be complete)
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3 years ago
consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i
eimsori [14]

we have

f(x)=x^{2} +2x-15

we know that

The x-intercept is the value of x when the value of the function is equal to zero

so

in this problem

Find the roots of the function

equate the function to zero

x^{2} +2x-15=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2} +2x=15

Complete the square. Remember to balance the equation by adding the same constants to each side

x^{2} +2x+1=15+1

x^{2} +2x+1=16

Rewrite as perfect squares

(x+1)^{2}=16

Square root both sides

(x+1)=(+/-)\sqrt{16}

(x+1)=(+/-)4

x=-1(+/-)4

x1=-1+4=3

x2=-1-4=-5

x^{2} +2x-15=(x-3)(x+5)

therefore

<u>the answer is</u>

the x-intercepts are the points (3,0) and (-5,0)

3 0
3 years ago
Read 2 more answers
Please help im stuck!
Nutka1998 [239]

Answer:

k

Step-by-step explanation:

k

4 0
3 years ago
Solve the following system of inequalities graphically on the set of axes below. State the coordinates of a point in the solutio
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Hola hola solo quiero puntos por que me odios
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3 years ago
What is 43/8+26/5? Show your work.
notsponge [240]
Basically you set it up 43/8+26/5. When you do that multiply 5 by 8 so the donominiter will be 40. Then multiply 5 by 43 which is 215 and 8 by 26 which is 208 so now you have the same donominiter... 215/40+208/40 add 215 to 208 that's 423/40 then you see how many times does 40 divide into 423 that's 10 and then you had 23 left so put 10 23/4 .if it was a case like 10 3/12 you could simplify it and that would be 10 1/4 ...
4 0
3 years ago
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