Kids on a field trip to a dairy farm are gathered in a barn with cows. if there are 11 heads and 28 legs in the barn, how many kids and how many cows are in the barn? This is urgent please help!!

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?