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padilas [110]
3 years ago
10

Percent of discount is 25% and the sale price is 40$ what is the original amount?

Mathematics
1 answer:
Crank3 years ago
6 0
<span>Percent of discount is 25% and the sale price is 40$ what is the original amount? $160

percent of discount is 5% and the sale price is 57$ what is the original amount? $60

percent of discount is 80% and the sale price is 90$ what is the original amount? $112.5

percent of discount is 15% and the sale price is 146.54$ what is the original 
amount? $976.93

the original price is 60$ and the sale price is 45$ what is the percent of discount? 25%

original price is 82$ and the sale price is 65.60$ what is the percent of discount? 20%

original price is 95$ and the sale price is 61.75$ what is the percent of discount? 35%</span>
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John estimates that there is 150 people at the party. After counting, there are actually 148 people at the party
kondaur [170]
The error was 1.33333333 percent
5 0
3 years ago
12x-20y=108 3x+ky=27 what is k
Sedaia [141]

Let's look at the second equation and try multiplying it by 4:

4 * (3x + ky) = 4 * 27

Which gives us:

12x + 4ky = 108

This looks almost exactly like the first equation except that instead of -20y, there is 4ky. We could try making them equal to each other and solving for k:

-20y = 4ky

-20 = 4k

k = -5

Then, the answer is k = -5.

3 0
3 years ago
What is the inverse of the function f(x)=1/9x+2
laiz [17]
Inverse works in this way:

y = 1/9x + 2,

you should swap the places of x and y and find y again, in this case it will be

x = 1/9y + 2    =>     x-2 = 1/9y    =>   (x-2) * 9y = 1   =>    9y = 1/(x-2)

and finally we got y = \frac{1}{(x-2)*9}
8 0
4 years ago
HURRY I NEED HELP QUICK
krek1111 [17]

The value of x the function when x = -7.5 is 34.5

<h3>Functions and values</h3>

Functions are written in terms of variables

Given the expression  –3.8x + 6, when the value of x is -7.5, hence;

f(x) =  –3.8x + 6

f(-7.5) = -3.8(-7.5) + 6

f(-7.5) = 28.5 + 6

f(-7.5) = 34.5

Hence the value of x the function when x = -7.5 is 34.5

Learn more on functions here: brainly.com/question/10439235

#SPJ1

4 0
2 years ago
How to solve all fraction algebra?
kap26 [50]

Answer:

-  \frac{1}{5}  -  \frac{4}{9} a =  \frac{2}{15}

-  \frac{4}{9} a =  \frac{2}{15}  +  \frac{1}{5}  \\  \\  -  \frac{4}{9} a =  \frac{1}{3 }  \\  \\  ( - 4 \times 3)a = (1 \times 9) \\  - 12a = 9 \\ a =   - \frac{9}{12}  \\  \\ { \underline{ \:  \: a =   - \frac{3}{4}  \:  \: }}

7 0
3 years ago
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