What is the sign of −4ab when a > 0 and b < 0 *need NOW

The sign is positive.

Step-by-step explanation:

a > 0 and b < 0

So, a·b < 0

⇒ -4·a·b > 0

⇒ -4·a·b - 4·a·b > 0

Hence, the sign will be positive

The sign is positive.

Step-by-step explanation:

-4 is being multiplied by a negative and a positive number. The positive has no affect, but the negatives cancel out.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

true? is that what you're asking or do you mean something else?