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Juliette [100K]
3 years ago
9

Write an expression to describe the sequence below. Use n to represent the position of a

Mathematics
1 answer:
MrRa [10]3 years ago
7 0

Answer:

n+1=x-1

Step-by-step explanation:

as n goes up, x decreases by 1 each time

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Enny White is shopping for CDs. She decides to purchase 3 movie soundtracks. The music store has 7 different movie soundtracks i
zubka84 [21]

Answer:

35\ ways

Step-by-step explanation:

we know that

<u><em>Combinations</em></u> are a way to calculate the total outcomes of an event where order of the outcomes does not matter.

To calculate combinations, we will use the formula

C(n,r)=\frac{n!}{r!(n-r)!}

where

n represents the total number of items

r represents the number of items being chosen at a time.

In this problem

n=7\\r=3

substitute

C(7,3)=\frac{7!}{3!(7-3)!}\\\\C(7,3)=\frac{7!}{3!(4)!}

simplify

C(7,3)=\frac{(7)(6)(5)4!}{3!(4)!}

C(7,3)=\frac{(7)(6)(5)}{3!}

C(7,3)=\frac{(7)(6)(5)}{(3)(2)(1)}

C(7,3)=35\ ways

6 0
3 years ago
the average speed of a race car is 240 km/h. if the race is 200 laps long with each lap being 4.02 km, how long will the race la
shtirl [24]
Each lap = 4.02 km
 200 laps x 4.02 = 804 km total

804 km / 240 km/h = 3.35 hours = 3 hours and 21 minutes

7 0
3 years ago
How to find the average rate of change of a function
ollegr [7]

ANSWER

Average Rate of Change

=  \frac{f(b) - f(a)}{b - a}

EXPLANATION

To find the average rate of change of y=f(x) from x=a to x=b means finding the slope of the secant line joining the points

(a,f(a)) and (b,f(b))

The slope of the secant line joining these points is

=  \frac{f(b) - f(a)}{b - a}

This gives the average rate of change of the function.

5 0
3 years ago
John leaves school to to home. He walks 6 blocks north and 8 blocks wesr. how far is john from the dchool
Jlenok [28]

Answer:

8 blocks left, 6 blocks up.

Step-by-step explanation:

Remember the acronym of NESW (North, East, South, West). I remember it as Never Eat Shredded Wheat. If you go 6 blocks up, and 8 blocks left, you would be 8 blocks left, and a little down.

- Educator

7 0
2 years ago
Select the correct answer,
krok68 [10]
There is no picture
4 0
2 years ago
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