Can someone please tell me the answer and if can you explain me how to solved please

D. 50

Step-by-step explanation:

A triangle has 180 degrees in total.

Add the two degrees you know

100+30=130

and then multiply from 180 to get the pther degree

180-130=50

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.

step-by-step explanation: