Suppose the number of 2 hours lessons are x and 1 hour lessons are y; thus,
2x+y=25
50x+30y=690
to get the values of x and y we solve the quadratic equation given;
from the top equation:
y=25-2x.......i
substituting i in our second equation we get:
50x+30(25-2x)=690
50x+750-60x=690
-10x=-60
thus;
x=6
hence we conclude that the number of 2 hours classes are 6 hours
Answer:
She's giving you advice at the beginning so as you read along you focus on that and it changes your perspective on the characters, setting, or what's happening in the story.
Step-by-step explanation:
Your question is incomplete.
If you want me to tell the ratio, its 3:2
How is it an error? Need more explatinion or an example
Mr Pham's retirement account has 410 000 dollars. Let's put to a situation that he's not withdrawing from his account for several years, and this earns an annual interest of 3.85%.Let's find out how much will he earn: => 3.85% = 3.85% / 100% = .0385 => 410 000 * 0.0385 = 15 785 dollars.Mr, Pham will earn around 15 785 dollars in every year for 2 years he will earn times 2 of this amount that will be added to his retirement amount. => 15 785 dollars * 2 = 31570 dollars for 2 years and so on.<span>
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