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2 years ago

What is the sign of 39 11/13 + -41 1/13

Mathematics

1 answer:

Radda [10]2 years ago

7 0

Answer:

-1.23076923077

Step-by-step explanation:

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the outdoor temperature was 8 degrees at midnight the. temperature declined 5 degrees during each. of the next 3 hours what was

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2 years ago

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Answer:

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2 years ago

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Simplify the following algebraic expressions:

Aleks [24]

$-2(x-2b+ \frac{1}{2})=-2*x+2*2b- \frac{2}{2}= -2x+4b-1$
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2 years ago

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Suppose that the functions u and w are defined as follows :

leonid [27]

Answer:

(u o w) (7) = 22

(w o u) 7) = 8

Step-by-step explanation:

We are given:

$u(x)= x^2+6\\w(x)= \sqrt{x+9}$

We need to find:

a) (u o w) (7)

First we will find (u o w) (x) and then we will find (u o w) (7)

We know that (u o w) (x) = u(w(x))

Put value of w(x) into u(x)

we have:

$u(x)=x^2+6\\Put\: x =\sqrt{x+9}\\u(w(x))=(\sqrt{x+9})^2+6\\u(w(x))=x+9+6\\ u(w(x))=x+15$

Now finding (u o w) (7)

We know that: (u o w) (7) = u(w(7))

$u(w(x))=x+15\\Put\:x=7\\u(w(7))=7+15\\u(w(7))=22$

So, (u o w) (7) = 22

b) (w o u) (7)

First we will find (w o u) (x) and then we will find (w o u) (7)

We know that (w o u) (x) = w(u(x))

Put value of u(x) into w(x)

we have:

$w(x)= \sqrt{x+9}\\Put\:x=x^2+6\\w(u(x))= \sqrt{(x^2+6)+9}\\w(u(x))= \sqrt{x^2+6+9}\\w(u(x))= \sqrt{x^2+15}$

Now finding (w o u) (7)

We know that (w o u) (7) = w(u(7))

$w(u(x))= \sqrt{x^2+15}\\Put\:x=7\\w(u(7))= \sqrt{(7)^2+15}\\w(u(7))= \sqrt{49+15}\\w(u(7))= \sqrt{64}\\w(u(7))= 8$

So, (w o u) (7) = 8

5 0

2 years ago