73, every number is in the same range except 73
6 is d because 20/16 simplified is 5/4
7 is d
She can read 1/3 of a page per minute
Answer:
0.71×10⁻⁶³
Step-by-step explanation:
Here in this problem, the expression (1.42×10⁻⁵⁰) / (2×10¹³) is given and we have to calculate the result not rewriting the numbers in decimal form.
Now, the given expression,
(1.42×10⁻⁵⁰) / (2×10¹³)
= {All the terms are in product form, so we can rearrange this}
=()()
=(0.71)() {We know the formula of indices }
=0.71×10⁻⁶³ (Answer)
So 5a=cost of adults
3s=cost of students
a+s=1142
5a+3s=4326
a+s=1142
subtract s from both sdies
a=1142-s
subsitute 1142-s for a
5(1142-s)+3s=4326
5710-5s+3s=4326
5710-2s=4326
subtract 5710 from both swides
-2s=4326-5710
-2s=-1384
dividee both sides by 2
-s=-692
multiply -1
s=692
692 students
subsittue
a+692=1142
subtract 692
a=450
s=692
a=450