I like the coefienti in front of 2nd degree to be positive
times -1
x^2-4x=-x+4
add x to both sides and minus 4 from both sides
x^2-3x-4=0
factor
what 2 numbers multiply to get -4 and add to get -3?
-4 and 1
(x-4)(x+1)=0
set to zero
x-4=0
x=4
x+1=0
x=-1
-1 and 4
C is answer
Answer: 18.
if aliyah gave 2 to her 4 children, thats 4x2 which equals 8, plus the 10 she took to get 18.
Answer: B
Step-by-step explanation:
Answer: 44%
Step-by-step explanation:
There are other ways of doing this but here's how I did it:
Starting with an arbitrary price for the shirt of $100, I took 30% off and arrived at $70.
Then 20% off $70 is $56 (20% is one-fifth, so divide 70 by 5 and you get 14. Subtract 14 from 70 and you get 56.
Now subtract 56 from 100 and you get 44, so to get to 56 from 100 you subtract 44%.
You could also use a calculator or google it but that would be missing the point of studying math and benefiting from its practical applications, e.g., how to figure things out for yourself. And that wouldn't be much fun, would it?
Consider the number of the adult tickets is x
X+2x=276
3x=276
X=92
So the student tickets is =184