2. round to the nearest tens place and then estimate the sum.
262 + 523
a 785
b 780
c 790
d 800

To round to the nearest tens place, look at he value of t he ones. If the ones is a 5 or higher you round the tens value up, if the ones is under 5, the tens value stays the same.

262, the ones is a 2, so the tens stays the same = 260

523, the ones is a 3, so the tens stays the same = 520

Now add: 260 + 520 = 780

The answer is B. 780

the answer is b 1/10

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c