How to Use Elimination to Solve a System of Two Linear Equations - apex 1. Identify as the best method for the problem.

2. Find a with equal or opposite coefficients in the
system

3. Add or subtract one
from the other.

4. the one-variable equation.

5. Substitute the value of that variable into the other

6. Solve for the second

7. Check your answer. Use and/or graphing

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)

the opening of this porabola is facing up

step-by-step explanation:

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.