Find a+b,2a+3b, iai, and ia-bi. a[5, -12], b=[-3, -6]

1) 2) 3) 13, 4) 10.

Step-by-step explanation:

Since we have given that

So, we need to find :

1) a + b is given by

2) 2a+3b is given by

3) |a| is given by

4) |a-b| is given by

Hence, 1) 2) 3) 13, 4) 10.

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.

the answer is d

for problems like this theres an app, its photomath that explains the problem and gives the answer hope i