Answer:
13.5 minutes
Step-by-step explanation:
128 = 3 minutes
128/3 = 1 minute worth of words
42.6 = 1 minute
576/42.6 = 13.5
I'd start by writing an equation for each of the right triangles. (Pythagorean theorem)
y² + 9² = z²
x² + z² = (4+9)²
4² + y² = x²
we want to find z so combine the equations by substituting the other variables x,y out.
substitute y² for (x² - 4²) in 1st equation.
(x² - 4²) + 9² = z²
now by rearranging the 2nd equation we can substitute x² for (13² - z²)
(13² - z²) - 4² + 9² = z²
169 - z² - 16 + 81 = z²
234 - z² = z²
234 = 2z²
234/2 = z²
117 = z²
√(117) = z
√(9*13) = z
3√(13) = z
13 goes in the box
Answer:
Rational Numbers: 1.1625, 5.15603418923, and -11/151
Irrational Numbers: √256, √141, and ∛25
Step-by-step explanation:
Rational Numbers are numbers that are decimals, fractions, and whole numbers.
Irrational Numbers are numbers that have square roots and cube roots.
The correct answer is: [B]: " (x + 3)(5x - 5) " .
_________________________________________________________
Answer:
9
Step-by-step explanation:
54+81=9(6+9)
9 times 9 equals 81
