Answer:

Step-by-step explanation:
Given

Required
Write in Standard Form
To start with; the two monomials have to be multiplied together;


Split the numerator and the denominator

Multiply Like terms

Divide 9 by 3 to give 3

Divide n³ by n to n²

Split fraction

From laws of indices;

becomes

Multiply all together

What are you supposed to do?
Answer:
6t=9? let me know if that's correct x
Step-by-step explanation:
ratio of adults to students can be written as a fraction
adult tickets / student tickets
140/210 can be simplified to 14/21
14/21 can be simplifed to 2/3
15·0.8 + x = 30·0.9 --> x = 15
C. is the correct answer