Solve each equation for x. a)x-1=0b)x+1=0 c)x²-1=0 d)x²+1=0

Answer

given,

a) x-1=0

adding both side with 1

   x = 1

b) x + 1 =0

subtracting both side by 1

    x = -1

c) x²- 1 =0

   x² = 1

taking square root

   x = √1

   x = 1

d) x²+ 1 =0

   x² = -1

taking square root

   x = √-1

   x = i (iota)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

what