Solve systems of equations algebraically

solve each system of equations algebraically.

1. y=x+2

y=-3x

2. y=-x

y=-7x

3. y=x-6

y=2x

4. y=x-4

y=2x

5. y=x+20

y=6x

Sue has 2 cats. Each cat eats of a tin of cat food each day. Sue buys 8 tins of cat food. Has Sue bought enough cat food to feed her 2 cats for 14 days? You must show how you get your answer.

Kim has 4 apples and what's the give 2 to Johnson how many apples left

Grade 8 Math Workbook Jessica has a part time job working at a clothes store. She is paid $13.25 per hour and she receives a 5% commission on her total sales. Last week she worked 18 + hours and her sales totalled $2750.

Bank A charges a monthly service fee of $5.00 and a per-check fee of $0.15, while Bank B charges a monthly service fee of $2.50 and a per-check fee of $0.35.

You ask your friend: "did you observe at least three heads?". your friend replies, "yes." what is the probability that coin 2 had been chosen?

1. In what country did the government debate the merit of teaching students quadratics? 2. What modern technology would not be possible without quadratics? (hint: I have one at my house.) 3. What great ideas did the Babylonians come up with? 4.

Which equation forms a pair of linear equations with 9x+12y=48 such that the system has no soulution?

What is the percent of decrease from 155,000 to 140,00

A telephone company charges $0.30 for the first 4 minutes of a call and $0.18 for each additional minute. How long can a person talk for $3

determine if these equations are true or false A. 50 tens x 4 hundreds = 40 tens x 5 hundreds B. 24 x 10 x 90 = 90 x 2400