15 (d) A boat travels from C to A at an average speed of x m/s.
A second boat travels from B to A at an average speed 1 m/s faster than the first boat.
It takes the first boat 1 minute longer to reach A than the second boat.
Write down an equation in x and show that it simplifies to x2 - 4x - 30 = 0.
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coins of silver or gold

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: