Answer:
= (y - 4x) (y - 7)
Step-by-step explanation:
y^2-4xy-7y+28x
--
factor out y from y^2 - 4x : y(y - 4x)
factor out 7 from 28x - 7y : 7(4x - y)
= y (y - 4x) + 7(4x - y)
7 (4x - y) + 7(y - 4x)
= y (y - 4x) - 7(y - 4x)
= (y - 4x) (y - 7)
Answer:
k = 0.167
Step-by-step explanation:
This is a direct proportion. That is as the number of chairs increases, so does the number of minutes needed.
y=number of chairs
x = time in minutes.
y = k x
4 = k * 24 Divide by 24
4/24 = k
You could leave it that way.
or you could do the division
k = 1/6 = 0.167
y = 0.167 x
Answer:
The equation is:
y= 103 --23d
Step-by-step explanation:
The initial amount was 103 grams.
After one day of use the remaining amount of soap was 80 grams.
So the amount of time he spent in one day was:
Each day Leslie spends 23 grams of soap.
if d represents the number of days elapsed then, the amount of soap "y" that Leslie spends after days is:
y= 103 --23d