Solve this system of equations using substitution.

a + b + c = 180

b = 3a

c = 5a

A pitcher could hold two twelves of a gallon of water. If Roger filled up nine pitchers, how much water would he have?

Which statements are always true regarding the diagram? Check all that apply. m∠5 + m∠3 = m∠1 m∠3 + m∠4 + m∠5 = 180° m∠5 + m∠6 = 180° m∠2 + m∠3 = m∠6 m∠2 + m∠3 + m∠5 = 180°

Multiply. Write your answer as a fraction in simplest form. 5/9 times 6

Ellen is 5 1/2 feet tall. Her sister is 3/4 foot shorter than Ellen. how tall is Ellens sister? write your answer as a improper fraction and as a mixed number

Drew's neighbor pays him $35 to mow her lawn and she always gives him a 20% tip. He decides to mow the lawn with his friend and split the earnings evenly. How much will each of them make?

From a group of 8 people, including George and Nina, 3 people are to be selected at random to work on a certain project. What is the probability that the 3 people selected will include George but not Nina? A) 5/56 B) 9/56 C) 15/56 D) 21/56 E) 25/56

5 (2x+6) - 17+0+0+0+0+0+0+0

What type of number is 3 - 771? Complex number Question in Khan Academy

2T+2T-8+3+5k there is a 2 as an exponent on the 5k but I can't wright it so FYI

show answer using graph y=2x - 3 y=3x + 2