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3 years ago

The price of an item yesterday was $180 today the price fell to $99 find the percentage decrease

Mathematics

2 answers:

riadik2000 [5.3K]3 years ago

7 0

It is 45 because im doing my work right now on Aleks and it just told me

Step-by-step explanation:

ololo11 [35]3 years ago

4 0

Answer:

55%

Step-by-step explanation:

to find percentages:

$\frac{part}{whole}$ I $\frac{percent}{100}$ pretend this is a box

basically just fill this in and it will give you what you want. For example, here, you have the original and part of the original so it will look like this:

$\frac{99}{180}$ I $\frac{x}{100}$ then you multiply across and divide top to bottom (doesn't matter in which order), so: $\frac{99}{180}$ =0.55 · 100 = 55%.

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The point (1, −1) is on the terminal side of angle θ, in standard position. What are the values of sine, cosine, and tangent of

mixer [17]

Notice the picture below

x = 1 and y = -1

now... recall your SOH CAH TOA $\bf sin(\theta)=\cfrac{y}{r}
\qquad 
% cosine
cos(\theta)=\cfrac{x}{r}
\qquad 
% tangent
tan(\theta)=\cfrac{y}{x}$

now.. what's the value for "r" or the radius? well, using the pythagorean theorem $\bf c^2=a^2+b^2\implies c=\sqrt{a^2+b^2}\qquad 
\begin{cases}
a=x\\
b=y\\
c=r
\end{cases}$

6 0

3 years ago

To rationalize the denominator of 2/square 13+ squared 11 , you should multiply the expression by which fraction?

eimsori [14]

Answer:

You should multiply the expression by $\frac{\sqrt{13}-\sqrt{11}}{\sqrt{13}-\sqrt{11}}$

Explanation:

To rationalize any expression, you must multiply it by its conjugate. A conjugate is defined as a similar expression to the original one but with an opposite sign

This means that:

The conjugate of a + b would be a - b

Now, the given expression is $\frac{2}{\sqrt{13}+\sqrt{11}}$

Consider the denominator:

From the above, we can conclude that the conjugate of $\sqrt{13}+\sqrt{11}$ is $\sqrt{13}-\sqrt{11}$

And, remember that we need to keep the value of the expression unchanged. This means that we must multiply both the numerator and the denominator by the same value

Therefore:

You should multiply the expression by $\frac{\sqrt{13}-\sqrt{11}}{\sqrt{13}-\sqrt{11}}$ in order to rationalize the denominator

Hope this helps :)

5 0

3 years ago

Read 2 more answers

Ignore “c”. i need help with 5 and 6. i suck at this lol. brainliest for whoever gives best answer

34kurt

Answer:

5 = 1/3

6 A = 24%

6 C = 26%

Step-by-step explanation:

sorry if its wrong i didn't have a lot of time

6 0

3 years ago

Marcie bought a can of corn at the supermarket. The price on the shelf said $3.99, but when Marcie went through the checkout lan

vampirchik [111]

That sure sounds like a coupon to me

3 0

3 years ago

Read 2 more answers

Here’s the other question... I also have more

Vika [28.1K]

Answer:

2 1/3!

Step-by-step explanation:

If you are subtracting fractions that both have a common denominator, think of it like this. so, if you are confused with whole numbers, why not make it improper? multiply the bottom number by the big number next to it, and add the top 2, which should give you 8/3. then subtract 1/3, which is 7/3, and if you simplify it, it should give you 1 1/3! :D

6 0

3 years ago