Step-by-step explanation:
A. cos4x-sin4x=2-cos2x
Every real number is irrational this is true
Answer:
j+1
Step-by-step explanation:
j/k + 1/k = ?/k
Since the denominator is the same, we can add the numerators
j/k + 1/k = ?/k
(j+1)/k = ?/k
180 is the speed of the motorboat. I don't know the speed of the current.
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120÷4=30
30×6=180
4x - 24 = -2x + 30
4x + 2x = 30 + 24
6x = 54
x = 9
answer: the number is 9
