sarah thinks of a positive number she calculates that the square of the number is 256 what is the square rootof the number
1 answer:
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Answer:
75% bigger
Step-by-step explanation:
Let the first number be x and the second be y.
So:
And:
-----30% less than x
Substitute in
Cross multiply
Collect like terms
Make x the subject
So, the average is:
Rewrite as:
Express as percentage
This means that the average is 75% bigger than the second number
Answer:
No
Step-by-step explanation:
For x and y to have a proportional relationship, then
the ratio of k = must be equal for all points
(2, 5) → k = = 2.5
(3, 7.5) → k = = 2.5
(5, 12.5) → k = = 2.5
(18, 8) → k = = 2.25 ≠ 2.5
k is not equal for all values , hence no proportional relationship exists