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3 years ago

4/9 times what equals 1?

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

8 0

4/9 *9/4 =1
Use the reciprocal to find your answer :)
Cheers :3

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Consider the functionf:R→Rdefined viaf(x) =|x|.(a) Give a functiongwith domainRsuch thatg◦fis one-to-one, or describe why it is

yaroslaw [1]

Answer:

(a) Is not possible

(b) It is possible

(d) Is NOT possible.

Step-by-step explanation:

(a)

Is not possible, notice that for any function $g$ such that

$g : \mathbb{R} \rightarrow \mathbb{R}$

you would have that

$(g\circ f)(x) = g(f(x)) = g(|x|)$

And for, lets say -3,3 you have that

$g(|-3|) = g(|3|) = g(3)$ therefore is not possible to find a function that is one to one.

(b)

It is possible. Take the following function

$g(x) = x\sin(x)$ since $\sin$ is periodic it will take positive and negative numbers and if you multiply by $x$ each period will become bigger and bigger.

(c)

It is possible. Take the function

$g(x) = \sqrt{x}$

Then

$(f \circ g )(x) = | \sqrt{x} | = \sqrt{x}$ and $\sqrt{x}$ is one to one.

(d)

It is NOT possible because $(f\circ g)(x) = f(g(x)) = |g(x)|$ and that will always be positive.

7 0

3 years ago

What’s pemdas and how do we use it ?

Gwar [14]

Answer:

pemdas is an order of operation

Step-by-step explanation:

PEMDAS STANDS FOR parentheis, exponents, multiplication, division, addition, and subtraction. it is the order of how you should solve multi step equations EXAMPLE: 1+2x2 FIRST you have to multiply the 2x2 because multiplication comes first in PEMDAS, then you do the addition so 2x2=4+1=5

3 0

3 years ago

(a/20)+(4/15)=(9/15)

Annette [7]

(a/20)+(4/15)=(9/15)
a/20 = (9/15)-(4/15)
a/20 =5/15
a/20 =1/3
a=20/3

7 0

4 years ago

What is the value of X in the equation

denpristay [2]

Answer:

X = 5 1/6 + 3/4 = 71/12

3 0