7.The marked price of shirts in a store is $30. During one week, the store sells m shirts at the marked price and n shirts discounted
10% of the marked price. Which of the following is an expression of I
the store revenue from shirts sold during that week?
a) 30m + 30n
b) 30m + 27n
c) 30(m + .10n)
d) 27m + 30n
e) 27m + 27n

y=mx+b

step-by-step explanation:

m slope

b y-intercept

a: 1/6, j: 1/4

step-by-step explanation: you are welcome

i need more details sorry

step-by-step explanation:

let f (x ) is a function and c be a positive real number,   the graph of the function g (x ) = f (cx ) is represented as follows.

when, c > 1,   the function compresses it in the x - direction.

when, 0 < c < 1, the function stretches it.

the function is g ( x ) = (9x )2.

the heighest power of x in g ( x ) = (9x )2 is 2, so the parent function is square function.

the equation of parent function is f ( x ) = x 2 .

the function is g ( x ) = (9x )2 and the parent function is f ( x ) = x 2 .

so, the functions f and g have the following relationship.

g ( x ) = f ( 9x ).

compare the function g ( x ) = f ( 9x ) with g (x ) = f (cx ).

c = 9 ( > 1 ).

so, the function g (x ) = (9x )2 compresses it in the x - direction.

step-by-step explanation: