True or false. you have to flip the inequality symbol in this problem:
-3x < 15
true
false

You can multiply both sides of an inequality by the same, nonzero number, but if this number is negative, you have to flip the sign.

In this case, in order to solve for x, you have to divide by -3 (i.e. multiply by -1/3), so yes, you must switch the sign:

Alternatively, you may add 3x to both sides:

Subtract 15 from both sides:

And divide both sides by 3:

The sign switch here was hidden behind the fact that we switched the two sides of the inequality

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify