Answer:

Step-by-step explanation:
Multiply numerator and denominator by √2

Answer:
7.5
Step-by-step explanation:
Answer:
Step-by-step explanation:
hello :
y= 5x + 9
y = -x +3
so : 5x+9 = -x+3
5x+x= 3-9
6x=-6
x=-6/6 = -1
Let n be the man's walking rate. Then:
9/n+9/27=3&1/3
243+9n=90n
243=81n
n=3
The man's walking rate was 3 mph
☺☺☺☺
7&8 if u draw it out first it'll help by tons