4•(-7) I need help on these with work including plz thx

12 + (-3)

-3(-4)

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

A50-foot ladder is leaning against a vertical wall. if the base of the ladder is 45 feet from the base of the wall, find the angle the bottling of the ladder makes with the ground.

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase