arianamedina200 arianamedina200
  • 25-08-2017
  • Mathematics
contestada

PLEASE HELP IVE BEEN STUCK ON THIS QUESTION FOR 20 MINS IDK :(

PLEASE HELP IVE BEEN STUCK ON THIS QUESTION FOR 20 MINS IDK class=

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 25-08-2017
remember
[tex]\frac{x^m}{x^n}=x^{m-n}[/tex]
and
if [tex]a^b=a^c[/tex] where a=a, then b=c
so
[tex]\frac{7^9}{7^n}=7^{9-n}=7^3[/tex]
[tex]7^{9-n}=7^3[/tex]
so
9-n=3
-n=-6
n=6

answer is 6
Answer Link

Otras preguntas

Can anyone help me find the simplest form for 15/23 / 6/7
Why do birds fly? And also how to get rid of scariness of birds?
In a bag of keys, there are 15 silver keys, 5 black keys, 11 copper keys, and 4 painted keys of various colors. One key is drawn out at random. What is the prob
What number should be added to the expression x2 + 14x to change it into a perfect square trinomial? (Points : 1) 7 14 28 49
If x = - 2 and y = 3, what is the value of - x∧- y? the answer is 1/8. how?
Help please, What does "Happy-Go-Lucky" Mean?
What are decomposers classified as in an ecosystem?
What Is the First New Deal?
Would a fire manager be for or against fire suppression?
Why do birds fly? And also how to get rid of scariness of birds?