P = 4x + 2(x + 5)
That’s the expression
P = perimeter
Answer: ($8.96 / 7) * 5 or $6.40
Step-by-step explanation: You need to find the price for one watermelon then multiply it by 5 to find the price of 5.
This is a composite. Another way to write them is f(g(x)). Take the function g(x) and stick it in for x in f(x). Like this:
. But we aren't done cuz there's some simplifying there to do.
and canceling out the 3's we get just a simple x as our answer. The choice is the last one above as your answer.
Ok, first group x terms
f(x)=(x²+4x)-8
factor out quadratic coefient (no need but that's the step)
f(x)=1(x²+4x)-8
take 1/2 of the linear coefient and square it
4/2=2, (2)²=4
add positive and negative of it insides the parenthasees
f(x)=1(x²+4x+4-4)-8
factor perfect square
f(x)=1((x+2)²-4)-8
distribute
f(x)=1(x+2)²-4-8
f(x)=1(x+2)²-12
and, now if we wanted to find the x intercepts where f(x)=0 then
0=1(x+2)²-12
12=(x+2)²
+/-2√3=x+2
-2+/-2√3=x
x=-2+2√3 or -2-2√3
that is where the x intercept are
and completed square form is
f(x)=(x+2)²-12
Domain is {1 ,2,3,4}
range is {3}
it's a function because each element in x has only one image in y
