Lynette drove 248 miles in four hours at that rate how many hours will it take her to drive an additional 93 miles

Remark

The question becomes "How long does it take her to drive 248 + 93 = 341 miles?"

Answer

Set up a simple proportion.

248/4 = 341/x            Cross multiply

248 * x = 4 * 341

248 x = 1364             Divide by 248

x = 1364/248

x = 5.5 hours  

But you are only asked about the 93 miles.

The number of hours for 93 miles is 5.5 - 4 = 1.5

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.