Answer:
x1=-4/5, x2=18/5 and x3=7/5
Step-by-step explanation:
you can do linear combination between the rows:
2nd row=R2-3R1 and 3th row=R3-2R1
3th row=(3R2-R3)/15
1st row=R1+3R3 and R2-11R3
x1=-4/5, x2=18/5 and x3=7/5
1. 63 is 90% of what number? 70 with double number lines-Super confused, please help!!
1 answer:
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Given:
The fees for a day student are $600 a term.
The fees for a boarding student are $1200 a term.
The school needs at least $720000 a term.
To show:
That the given information can be written as .
Solution:
Let x be the number of day students and y be the number of boarding students.
The fees for a day student are a term.
So, the fees for day students are
a term.
The fees for a boarding student are a term.
The fees for boarding student are
a term.
Total fees for day students and
boarding student is:
The school needs at least $720000 a term. It means, total fees must be greater than or equal to $720000.
Divide both sides by 600.
Hence proved.