Downstream 280mi/7 hours
(Speed =change in position/change in time)
40mi/hr
Back
280/14
20mi/hr
Answer: -13
Step-by-step explanation:
2-(3^2)+4-3-7 = -13
(a-b)(a+b) because when you reverse the sum you do axa and ax-b xx
Answer:
180
Step-by-step explanation: 60+60 =120 120+6
Answer: 18x^3-9x^2+21x
Solution:
3x(6x^2-3x+7)=
Applying the distributive property in the multiplication to eliminate the parentheses:
(3x)(6x^2)+(3x)(-3x)+(3x)(7)=
(3*6)x^(1+2)+3*(-3)x^(1+1)+(3*7)x=
18x^3-9x^2+21x
