X = 36/5
Or x = 7.2
21 + x = 6x - 15
21 = 6x - 15 - x
21 = 5x - 15
21 + 15 = 5x
36 = 5x
36/5 = x
Answer:
B.
Step-by-step explanation:
Short Answer: x = 2*sqrt(2)
The Pythagorean Theorem states that
a^2 + b^2 = c^2
Givens
a = 2
b = 2
c = ???
Sub and solve
2^2 + 2^2 = c^2
c^2 = 4 + 4
c^2 = 8 Take the sqrt of both sides of the equation
sqrt(c^2) = sqrt(8) Express 8 in it's prime factor form.
sqrt(c^2) = sqrt(2 * 2 * 2)
The rule about square roots is
If you have a pair of prime factors under the root sign, you take out one of the prime factors and throw the other one away.
sqrt(c^2) = 2*sqr(2)
Answer x = 2*sqrt(2)
Answer:
0
Step-by-step explanation:
There are an infinite number of equivalent expressions. Perhaps the simplest is the value of the expression:
4 - 4 = 0
