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3 years ago

Need help again with this

Mathematics

2 answers:

nalin [4]3 years ago

7 0

I think it would be B

katovenus [111]3 years ago

6 0

I believe that number 2 is a.

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List at least four investment alternatives.

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The question doesn't seem specific enough. If there are options, please list.

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3 years ago

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How many solutions does this system of linear equations have? Explain. 3y + 6x = 12 8x + 4y = 16

Vilka [71]

Answer:

first equation : 3y + 6×=12

second equation : 4y + 8x = 16

Step-by-step explanation:

first equation

3y + 6× = 12

now take the common ,

3( y + 2x ) = 12

so, y + 2x = 4

second equation

4y + 8x = 16

4 ( y + 2x ) = 16

so, y + 2x = 4

two lines with same equation have infinitely many solution . these two equations are the same so there are infinitely many solution .

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3 years ago

Some animals on farms eat hay to get energy. A horse can eat twenty pounds of hay each day. Write and evaluate an expression to

dangina [55]

Answer:

Step-by-step explanation:

20pounds/day * 14days * 20horses

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3 years ago

Explain why sin^-1(sin(3pi/4))does not equal 3pi/4 when y=sin x and y=sin^-1 x are inverses.

Fofino [41]

Because they're not inverses, not exactly. $\sin x$ is not invertible on its entire domain because it's not one-to-one. There are infinitely many values of $x$ such that $\sin x=0$ , for example.

The standard function $\sin^{-1}x$ has a domain of $-1\le x\le1$ and outputs values between $-\dfrac\pi2$ and $\dfrac\pi2$ . This means that its inverse, $\sin x$ , is indeed its inverse as long as $-\dfrac\pi2\le x\le\dfrac\pi2$ .

$\dfrac{3\pi}4$ is larger than $\dfrac\pi2$ and thus does not fall in the "invertible part" of the domain of $\sin x$ . We have

$\sin\dfrac{3\pi}4=\dfrac1{\sqrt2}$

which is a value between -1 and 1, so that

$\sin^{-1}\left(\sin\dfrac{3\pi}4\right)=\sin^{-1}\left(\dfrac1{\sqrt2}\right)=\dfrac\pi4$

If we wanted to recover $\dfrac{3\pi}4$ , we'd have to redefine $\sin^{-1}x$ or define a new inverse function that works on a different branch of the domain of $\sin x$ .

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3 years ago

If 1/2 of the students in the class like cookies and 3/4 of those who like cookies, also like ice cream, what fraction of the cl

Annette [7]

Answer:

75/2 or 37.5

Not sure if this is what you're looking for but i hope it helps anyway.

7 0

3 years ago