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2 years ago

15

Sarah says that 19 divided by. 9 equals 9 divided by 4 because both are 2r1 show here mistake using decimal division. How do I f

ind out how she’s wrong?

1 answer:

IgorLugansk [536]2 years ago

5 0

9*4=36 and 19/9 isn’t the same

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A car that sold for $11,900 has a sales tax of $767. How

dlinn [17]

Answer: 9,953

Step-by-step explanation:

The first step is to find what the sales tax rate is for the first car because it will be the same for the second.

11,900/767 = .064

Now to find the cost of the second car we divide.

637/.064 = 9,953.125 Round to nearest dollar.

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2 years ago

(cos x - (sqrt 2)/2)(sec x -1)=0

Darya [45]

$(\cos x-\frac{\sqrt{2}}{2})(\sec x-1)$ =0 [/tex]

$=(\cos x-\frac{1}{\sqrt{2}})(\sec x-1)$ =0 [/tex]

$\frac{(\sqrt{2}\cos x-1)}{\sqrt{2}}(\frac{1}{\cos x\ }-1)=0$

(Reciprocal Identity)

$(\frac{^{\sqrt{2}\\cos x-1}}{^{\sqrt{2}}})(\frac{1-\cos x}{\cos x})=0$

$\frac{^{(\sqrt{2}\cos x-1})}{\sqrt{2}}\frac{(1-\cos x)}{\cos x}=0$

$(\sqrt{2}\cos x-1}){(1-\cos x)}=0$ (ZeroProduct Property)

$\sqrt{2}\cos x-1=0$

$\sqrt{2}\cos x=1$

$\cos x=\frac{1}{\sqrt{2}}$

$x=\frac{\Pi }{4}$

and

$1-\cos x=0$

$\cos x=1$

$x=0$

x=0 and x= $\frac{\Pi }{4}$ are the solutions.

6 0

3 years ago

Read 2 more answers

Linear or nonlinear

marusya05 [52]

Answer:

I think its linear so I dont know 100% but I think it's a sorry if I'm wrong

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2 years ago

Read 2 more answers

C is 8 more than half than n

cestrela7 [59]

1/2n+8=c one half of n plus 8 equals c

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3 years ago

Erica says that 1/5 of the national flag of Thailand shown on the right is blue. what’s wrong?

Angelina_Jolie [31]

Answer:

The blue portion of the flag is actually 2/6 or 1/3 of the flag

Step-by-step explanation:

If you look at the size of the blue portion of the line it takes up twice the space as the white part. Imagine a small line drawn through the middle of the blue rectangle, now you can see that the flag is split up into 6 parts, rather then 5! Since we now have 2/6 of the flag being taken up by blue, that can be reduced down to 1/3 of the flag covered in blue.

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3 years ago