Please help ASAP Analysis: For the given system, tell which equation you would first use to solve for a variable in the first step
of the substitution method. Explain your choice.
2.5x – 7y = 7.5
6.2 - y = 1

step-by-step explanation:

no of data

divide by no of mode

answer:

a=9

step-by-step explanation: lmk if you need a explanation

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

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.