Solve each system of equations by substitution

Y=4x+13 y=6x+19

Is one hundred eighty seven plus seven even

What is halfway between 20 and 29

A total of 720 people attended the school-basketball game. adult tickets cost $2.50 each and student tickets cost $1.50 each. if $1220 worth of tickets were sold, how many students and how many adults attended?

M divided by n = p-6 for n

R on the set {1,2,3,4,5}, so that (x, y) is in R if 3 divides x+y. List the elements of R.

Ten friends went to a local restaurant and all had the buffet at $6.75 each. Seven friends added ice cream for dessert for $1.99 each. Since it is a large group, a tip of $15.00 for the waitress was added. The following is the restaurant bill.

Betsy wants to paint the walls of her bedroom. Her bedroom measures 8 ft. by 10 ft. and has 8 ft. ceilings. Not counting doors and windows, how many square feet of wall will Betsy need to paint? 288 80 128 160

One winter the cost of bananas cost $0.80 per lb. The next winter the cost was $1.05 per lb. What was the percentage increase?

Which number is in the hundredths place 4982.6173

What are the zeros of f (x) = x2 - 8x + 16?