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2 years ago

F−1(−2) = f(−4) = f(f−1(−2)) =

Mathematics

2 answers:

Sauron [17]2 years ago

7 0

need more information

saveliy_v [14]2 years ago

6 0

Answer:

f−1(−2) = -2

f(-4)= -4

(f−1(−2)) = -2

Step-by-step explanation:

i could be wrong i am sorry if i am

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Jordan drives to the store at 30 miles per hour. On her way home she averages only 20 miles per hour. If the total driving time

cupoosta [38]

Answer:

Jordan lives 18 miles away from the store

Step-by-step explanation:

Distance=speed × time

Where,

d= distance

s= speed

t= time

Total driving time takes half an hour

Distance=speed × time

time=Distance/speed

t=1.5

Speed 1=30 mph

Speed 2:=20 mph

t=d/s1 + d/s2

1.5=d/30 + d/20

1.5=20d + 30d / 600

1.5=50d/600

Cross product

1.5×600=50d

900=50d

Divide both sides by 50

900/50=d

18=d

Therefore,

d=18 miles

Jordan lives 18 miles away from the store

8 0

3 years ago

Find 9P9 and 9C9. Why do the answers differ?

sveta [45]

We have been given two expressions $9P9\text{ and }9C9$ . We are asked to find the value of each.

To find 9P9, we will use permutations formula.

$^nP_r=\frac{n!}{(n-r)!}$ , where

P = Number of permutations,

n = The total number of objects in the set,

r = Number of objects being chosen from the set.

$9P9=\frac{9!}{(9-9)!}$

$9P9=\frac{9\cdot 8\cdot 7\cdot 6\cdot 5\cdot 4\cdot 3\cdot 2\cdot 1}{(0)!}$

$9P9=\frac{362880}{1}$ Using $0!=1$

$9P9=362880$

To find 9C9, we will use combinations formula.

$^nC_r=\frac{n!}{r!(n-r)!}$ , where

C = Number of combinations,

n = The total number of objects in the set,

r = Number of objects being chosen from the set.

$9C9=\frac{9!}{9!(9-9)!}$

$9C9=\frac{9!}{9!(0)!}$

$9C9=\frac{9!}{9!\cdot 1}$ Using $0!=1$

Cancelling out $9!$ , we will get:

$9C9=\frac{1}{1}$

$9C9=1$

The answers differ because order. With permutations we care about the order of the elements, while with combinations we don't.

3 0

3 years ago

The interest that Cindy earns on her investment is given by the equation l = 42t where t is the time in years that her money is

alexandr1967 [171]

I = 42t

When t = 5, I = 42*5 = 210

When t = 6, I = 42*6 = 252

When t = 7, I = 42*7 = 294

When t = 8, I = 42*8 = 336

When t = 9, I = 42*9 = 378

When t = 10, I = 42*10 = 420

8 0

3 years ago

Read 2 more answers

How many times longer is the diameter of a grain of sand than the diameter of the average cell in the human body? Show your work

kolezko [41]

100 times longer because the sand grand is a very tiny particle

7 0

2 years ago

Help please ‼️‼️‼️‼️

Andrei [34K]

Answer:

I got (y-7)=1/13(x+6) for point slope

and y=1/3x+13 for slope intercept form

double check me though I'm new at this

3 0

2 years ago