The total number of fish bought was 320. And you know she bought two types of fish. The best way to solve this is guess and check. It would be the fastest. So she bought 7 times as many trigger-fish as parrot fish that means the number of trigger-fish bought was 7p. This means 320 = 7p +p. So all you do is take educated guesses for the number of parrot fish and check if it is right. So if she bought 50 parrot fish. 7(50) + 50 = 400. Close but a bit high. Lets keep guessing. 7(35) + 35 = 245. So now we know the answer is between 50 and 35. So lets try 40. 7(40) + 40 =320. That works so we know she bought 40 parrot fish and 280 trigger-fish.
I don't know I am just trying to get my questions answered
It's going to be kind of crazy, but you need to use Pythagorean's Theorem for this. That will look like this:
. FOIL out the left side to get
. FOIL out the first of the 2 expressions on the right to get
, and the second of the 2 to get 4x. Our equation now looks like this:
. Combine like terms to get an equation that still has square roots in it that we have to deal with:
and
. We will square both sides to get rid of the square root sign.
. This is a polynomial now that can be factored to solve for x. Bring the 2x over by subtraction and set the polynomial equal to 0.
. Factor out an x, leaving us with x(x-2)=0. That means that x = 0 or x - 2 = 0 and x = 2. Of course if we are solving for the length of a side we know it can't have a side length of 0, so it must have a side length that is a multiple of 2. x = 2
Answer:
Step-by-step explanation:it’s number 4