A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
- 2x – 4y = 38
5x – 4y = 3

A. Subtract to eliminate y.
B. Add to eliminate y.
C. Subtract to eliminate x.
D. Add to eliminate x.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

If square root x = -7, then x= -49 true or false

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.