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Since the plane travels 213 miles per hour, it must travel on average 1 mile every 1/213rd of an hour.We know that there are 60 minutes in 1 hour, and 60 seconds in a minute, so there are 60 x 60 = 3600 s...

x₁ = 2x₂ = -7

First thing you have to do is look at the number 10 and number 15. which number goes into 10 and 15 , its 5. 5 goes outside the first bracket. = 5( )next you have to find the like terms, both 10pq and 15p...

ln(x)+c

(a). Using Pythagoras' Theorem, (x + 1)² + (x - 1)² = x² + 2. (b). (x + 1) cannot = (x - 1) for any x.