What I believe they are asking is to find which of those is the simplified quadratic formula. The quadratic formula is -b (plus or minus) (√b²-4ac) all divided by 2a.
This formula works when the equation is set up as ax²+bx+c
Rational number, because the Square root of 400 is 20, since 20 x itself is 400. Hope this helps!
Subtract 7 from 60 3 times, and your answer will be 39.
So we can say that sedans are x, as the other two cars are based on it.
So there are 2 times as many coupes as sedans so coupes are 2x. And there are 4 times as many sports utility vehicles than sedans so they are 4x.
So we can add them all together to get the number of cars washed.
The equation is: x+2x+4x=350
Simplifying your get 7x=350, and x becomes 50.
We then divide 50/2 because 1 car is equal to $2. So then there would be 50 coupes (2 * 25 or 2x) that were washed.
25 sedans, 50 coupes, and 100 sports-utility vehicles were washed.
I hope this helps! (Please thank or brainliest if you can, I’d really appreciate it!)
Answer:
Step-by-step explanation:
Remember the identities:
Ginven the expression:
You need to substitute 
and 
into it:
Now, you need to simplify.
Remember that:
And:
Then, you get:
