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Kisachek [45]
2 years ago
13

X2 +2x -15 factories using the ac method

Mathematics
1 answer:
jeka57 [31]2 years ago
3 0

Answer:

Step-by-step explanation:

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The number of students in Mrs. Patrick's piano class decreased by 15% in 2 years to 17 students. How many students did she have
guapka [62]

Answer:

20 students

Step-by-step explanation:

If the class decreased by 15%, the students that she has now (17) represents a percentaje of:

100% - 15% = 85%

so<u> the 17 students are 85% of what she had</u>:

Students         Percentage

      17          ⇒        85%

and we are looking for how many students she had 2 years ago, thus we are looking for the <u>100%</u> of students (the original number of studens). If we represent this number by x:

Students         Percentage

      17          ⇒        85%

      x          ⇒        100%

and we solve this problem using the <u>rule of three</u>: multiply the cross quantities on the table( 17 and 100) and then divide by the remaining amount (85):

x = 17*100/85

x = 1700/85

x=20

2 years ago she had 20 students

6 0
3 years ago
Express this as a difference: 7+3<br> Plz explain If you do you will get brainlyes
likoan [24]
10 because if you 3 with 7 I will make 10




Did I blow your mind so hit that heart button
8 0
3 years ago
Read 2 more answers
You drive 45 miles per hour. what is your speed in feet per second
Oxana [17]
You can use a calculator online.
Here's the link but I already did it for you

https://www.metric-conversions.org/speed/miles-per-hour-to-feet-per-second.htm?val=45

It's 66 ft per second.
7 0
3 years ago
The answer to this question
weqwewe [10]

Answer:

2 miles per hour!

Step-by-step explanation:

It shows that it changes by 2 hours each time! :)

4 0
3 years ago
Consider the line y=4/3x + 3
kondaur [170]

Answer:

4.7

Step-by-step explanation:

I hope my answer help

8 0
2 years ago
Read 2 more answers
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