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sveticcg [70]
3 years ago
14

The monthly rent of Marilyn's house went from $500 to $400, if p is the percent decrease in the rent, which proportion can be us

ed to calculate p?
Mathematics
1 answer:
faust18 [17]3 years ago
3 0
For this case we can use the following rule of three:
 $ 500 ---------> 100%
 $ 400 ---------> x
 Clearing x we have:
 x = (400/500) * (100) = 80%
 Therefore, the percentage of decrease in the rent is:
 p = 100-x
 p = 100-80
 p = 80%
 Answer:
 
a proportion can be used to calculate p is:
 
p = 100 - ((400/500) * (100))
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Most ATM’s require a 4-digit code using the digits 0-9 how many 4-digit codes can you use
Zolol [24]

10000 digits can be used for 4 digit A.T.M code.

<u>Solution:</u>

Given that A.T.M required 4 digit codes using the digits 0 to 9.  

Need to determine how many four digit code can be used.

We are assuming that number starting with 0 are also valid ATM codes that means 0789 , 0089 , 0006 and 0000 are also valid A.T.M codes.

Now we have four places to be filled by 0 to 9 that is 10 numbers

Also need to keep in mind that repetition is allowed in this case means if 9 is selected at thousands place than also it is available for hundreds, ones or tens place .  

First digit can be selected in 10 ways that is from 0 to 9.

After selecting first digit, second digit can be selected in 10 ways that is 0 to 9 and same holds true for third and fourth digit.

So number of ways in which four digit number is created = 10 x 10 x 10 x 10 = 10000 ways

Hence 10000 digits can be used for 4 digit A.T.M code.

7 0
3 years ago
Mary earns $5 per hour as a waitress. Last week she took home her regular earnings of $5 per hour plus $182 in tips for a total
Greeley [361]
The answer would be 24
4 0
3 years ago
Read 2 more answers
Please help me gotta pass
Rudik [331]
Answer:

Y=59 Z=93

Explanation:

To find Z, you have to know the line is equal to 180 degrees. You then subtract 180-87=93 that’s how you get Z. Then with that you know that 34+Y is going to equal 93 because they are across from each other. I forgot what that property is called, but yeah. Then you subtract 93-34=59 there you go hope that helps :)
4 0
3 years ago
Help pls! Brainliest!
blagie [28]

Answer:

y =-3000x +12000

Step-by-step explanation:

answer is

1)   12000 is the constant therefore when the number of hours is 0 the tickets are 12000

2)  the number of tickets (y) are reducing by 3000 for each hour(x). thus the coefficient of variable x should be -3000  (negative because it is reducing)

8 0
3 years ago
Show that sin (x + pi) = -sin x.
Lunna [17]

Answer:

The answer in the procedure

Step-by-step explanation:

we know that

sin(A + B) = sin A cos B + cos A sin B

In this problem we have

sin(x + \pi)=sin (x)cos(\pi) + cos(x)sin(\pi)

Remember that

sin(\pi) = 0

cos(\pi) = -1

substitute

sin(x + \pi) = sin(x)(-1) + cos(x)(0)

sin(x + \pi) = -sin(x)

4 0
3 years ago
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