Answer:
Step-by-step explanation:
- per year=2%
- 5 years=10%
- 6 years=12%
- 7 years=14%
So basically ur adding 2 % every year.
you substitute 5y+41 for x and get 5y+41+3y=-15 then you simplify by doing 8y+41=-51 subtract 41 from each side and divide by 8 to get y alone. That's how you get 11.5 for your answer.
An easy way to answer this problem is to find the mid-point between the two given points, namely ( (4-2)/2, (1-11)/2 )=(1,-5).
Another way is to find a line through the two points, and select any point on the line.
Slope = (1-(-11))/(4-(-2))=12/6=2
Then use the point slope form to find the line:
y-1=2(x-4) which can be simplified to
y=2x-7
Put x=0, y=-7 => (0,-7)
Put x=1, y=-5 => (1, -5) [ as above ]
Put x=2, y=-3 => (2, -3)
....
Answer:
(x+9) are the like terms so u just put 5x and -7 in brackets
the answer is
(5x-7) ( x+9)
Unit rate for $40 for 100 books is $0.40 and the unit rate for $75 for 250 books is $0.30. so the $75 for 250 books is better. to find unit rate you do 40/100 and 75/250
