The way i do it, is sort of like this :
Is 7 a factor of 42?
Is 5 a factor of 42?
7 is a factor of 42.
It must be in multiples of 7!
Therefore, we have 5 on the other side, which makes it 5 x 7 = 35
Answer:
-10 HAPPY TO HELP ILY <3
Step-by-step explanation:
Answer:
y = 3x-15 and y = x-7
Step-by-step explanation:
We are asked to write a system of equations with the solution (4,-3)
It is sufficient if we find two lines passing through this point.
Let us take first line as with slope 3.
Then the equation would be of the form
y-y1 = m(x-x1)
y+3 = 3(x-4)
Or y = 3x-15 is one line
Let second line have slope 1
y+3 = 1(x-4)
y = x-7
Now we have two systems of equations as
y = 3x-15 and y = x-7
Answer:
$384
Step-by-step explanation:
100%-25%=75% 100%-20%=80%
640*0.75=480 (price after 25% off)
480*0.80 =384 (price after the second discount of 20%)
