Step-by-step explanation:
here
10^2=8^2+X^2
X^2=100-64
X=√36
X=6
Answer:
29
Step-by-step explanation:
(21 miles/gallon) x (21 gallons) = 21 x 21 = 441 miles
Answer:

Step-by-step explanation:
we have the options

the one that is a perfect equare tinomial is:

because we can rewrite this as follows:
this is because we know that

thus

and the other options cannot be represented as a perfect square trinomial, so the correct answer is:

Answer:
Y=-5/4+20
Step-by-step explanation: