Answer:
7(x+3)
Step-by-step explanation:
7x+21
7x = 7*x
21 = 7*3
We can factor out a 7 from both terms. What remains is what is inside the parentheses
C
Do 300 x 0.6=180
36 miles (b+C) (3)of rate
let family income be x
32%x=15680
32/100x=15680
x=15680X100/32
x=49000
the last one