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3 years ago

Is (-8,-2) a solution to the systems of equations? X-4y=2 5x-8y=-6

Mathematics

1 answer:

Radda [10]3 years ago

5 0

Answer:

Step-by-step explanation:

It is 4 /6)7)2\€{

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lozanna [386]

Answer:

$29.75(without tax) (I don't know if you need it with tax)

Step-by-step explanation:

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2 years ago

Which equation represents a linear function?

olga nikolaevna [1]

Answer: Equation 3

Step-by-step explanation:

It does not have any exponents, meaning it's linear

4 0

3 years ago

Read 2 more answers

Can someone solve this?

ladessa [460]

First question:

Recall that $\cos^2x+\sin^2x=1$ and $\sqrt{x^2}=|x|$ for all $x$ . So

$\sqrt{1-\cos^2x}=\sqrt{\sin^2x}=|\sin x|$

$\sqrt{1-\sin^2x}=\sqrt{\cos^2x}=|\cos x|$

For $0$ , we expect both $\cos x>0$ and $\sin x>0$ (i.e. the sine and cosine of any angle that lies in the first quadrant must be positive). By definition of absolute value, $|x|=x$ if $x>0$ .

So we have

$\dfrac{\sqrt{1-\cos^2x}}{\sin x}+\dfrac{\sqrt{1-\sin^2x}}{\cos x}=\dfrac{\sin x}{\sin x}+\dfrac{\cos x}{\cos x}=1+1=\boxed{2}$

making H the answer.

Second question:

C is always true, because the inequality reduces to x > y.

6 0

3 years ago

Simplify. 8r(4 - p) 32r -p 32r - 8rp 32 - rp 4 - 8rp

gizmo_the_mogwai [7]

So the right answer is of option B.

Look at the attached picture

hope it will be helpful to you...

4 0

3 years ago

Read 2 more answers

I need help ASAP PLEASE

White raven [17]

A) y= x+1
b) y= -2/3x-5
c) y=-1/2x+12
d) y= 4x-3/2
According to my calculations all the answers should be correct.

7 0

3 years ago