johnschlappy
johnschlappy johnschlappy
  • 16-08-2016
  • Mathematics
contestada

What is the value of the expression?

7^-3x7^9/7^-8


A.
714

B.
72

C.
7−14

D.
7−2

Respuesta :

dalendrk
dalendrk dalendrk
  • 16-08-2016
[tex]Use:\\a^n\cdot a^m=a^{n+m}\ and\ a^n:a^m=a^{n-m}\\\\7^{-3}\cdot\dfrac{7^9}{7^{-8}}=7^{-3}\cdot7^{9-(-8)}=7^{-3+9+8}=7^{14}\\\\Answer:\boxed{A.\ 7^{14}}[/tex]
Answer Link

Otras preguntas

A particle begins to move with uniform acceleration. If in the first second it travels 3m then next second it will go: A. 6 m B. 9 m C. 12m D. 15 m
what do we call a singing technique where the notes are half-spoken, half sung?
Answer asap How many members of the UN are there? Why would this matter?
Some plz help!! It’s for a project u need to finish it today. I don’t understand!! Sorry if my photos are backward it keeps doing that on here. WILL MARK AS BRA
what are the laws for assistance animals?
ins. Choose the correct option pt2 Foxes live/lives in the forest Michael doesn" t drive/drives to work Do/Does he know how to swim? Lisa andNancy often jog/jog
Energy is produced directly during the Bridge Reaction in the form of ATP. True or False​
Salary An employer pays a mean salary for a 5-day workweek of $1250 with a standard deviation of $129. On the weekends, his salary expenses have a mean of $450
Complete and balance the following redox reaction in basic solution Cr2O-2-(aq) + 12(s) → Cr3+(aq) + 103-(aq)
Melody can cycle for 30 miles against the wind in the same amount of time that it takes to cycle 56 miles with the wind. If the speed of the wind is 3mph, what