Use the given sets to find X n (Y U Z). U = {a, b, c, d,...,x, y,z}
X = {n, u, m, b, e, r}
Y = {b, r, e, a, t, h}
Z = {I, a, u, g, h, t, e, r}

With Y = {b, r, e, a, t, h} and Z = {l, a, u, g, h, t, e, r}, their union is

Y U Z = {b, r, e, a, t, h, l, u, g}

Then with X = {n, u, m, b, e, r}, the intersection with Y U Z is

X ∩ (Y U Z) = {u, b, e, r}

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.