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3 years ago

Can you help me on his question

Mathematics

2 answers:

liraira [26]3 years ago

7 0

C 2 (-20)

He withdrew (took out) money twice.
That's -20 two times.

cestrela7 [59]3 years ago

3 0

How do you subtract an inter from another integer without using a number line or counters

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Helppp!! I NEED HELP PLEASE

Elodia [21]

Given:

The table of values for the function f(x).

To find:

The values $f^{-1}(f(3.14))$ and $f(f(-7))$ .

Solution:

From the given table, it is clear that the function f(x) is defined as:

$f(x)=\{(-14,11),(-7,-12),(-12,-5),(9,1),(10,-2),(-2,13)\}$

We know that if (a,b) is in the function f(x), then (b,a) must be in the function $f^{-1}(x)$ . So, the inverse function is defined as:

$f^{-1}(x)=\{(11,-14),(-12,-7),(-5,-12),(1,9),(-2,10),(13,-2)\}$

And,

$f^{-1}(f(a))=f^{1}(b)$

$f^{-1}(f(a))=a$ ...(i)

Using (i), we get

$f^{-1}(f(3.14))=3.14$

Now,

$f(f(-7))=f(-12)$

$f(f(-7))=5$

Therefore, the required values are $f^{-1}(f(3.14))=3.14$ and $f(f(-7))=5$ .

5 0

3 years ago

Last week, there were 420 new subscribers to a Web site. This week, the number of new subscribers decreased by 5%. How many new

zlopas [31]

Answer:

x = 399 new subscribers

Step-by-step explanation:

Let 420 = 100%

x = 95%

420*95 = 100x

x = 420*95/100

x = 399 new subscribers

3 0

2 years ago

The scale on a drawing is 2:in:5yd. If a length on the drawing is 6 inches, what is the actual length.

Svetach [21]

Answer:

15 yards

Step-by-step explanation:

proportion:

2/5:6/X

2x=30

x=15

3 0

3 years ago

Solve 7n 6 4n-2=2n 2(4n 6)

scoray [572]

More information is required to answer the question correctly.

6 0

3 years ago

Can someone help me with this? Thank you!

satela [25.4K]

The correct answer should be the third option. YOU'RE WELCOME :D

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3 years ago