waterborn9800
07.10.2020 •
Mathematics
A piano teacher charges students $20.25 each month, plus $5.25 per hour for lessons.
Which expression and value represent the total the instructor will charge a student for hours of lessons in a month
and the amount the instructor would charge a student for 15 hours of lessons in a month?
$20.25 -2; $15
$20.25 +x: $25.50
O $20.25 - $5.25x; $58.50
O $20.25 + $5.25x; $99
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Ответ:
The answer should be D. $20.25+$5.25x; $99
Step-by-step explanation:
y=mx+b
m=$5.25
x=15
b=$20.25
This gives us:
5.25x + 20.25
5.25(15)+20.25
78.75+20.25
y=99
20.25 + 5.25x ; 99
Hope this helps!
Ответ:
scientific notation is a way scientists simplify very large numbers so they can write them over and over with less hassle.
Step-by-step explanation:
give them an example like 2000. move the decimal place to the left 3 places. then multiply the new number --2-- by ten to the power of 3.