In order for the data set to represent a function, there can be no duplicates of the first value.
A. 1 is used as the first value more than once <em> it is NOT a function</em>
B. 3 is used as the first value more than once <em> it is NOT a function</em>
C. no first number is used more than once <em>it IS a function</em>
D. 3 is used as the first value more than once <em> it is NOT a function</em>
Answer: C
Gianna paid less per necklace so she got the better deal
Gianna: 50.75 / 7 = 7.25
So she paid $7.25 per necklace
Winnie: 24.60 / 3 = 8.20
So she paid $8.20 per necklace
Answer:
pq=su
Step-by-step explanation:
its the only one that makes sense
Answer:
a = 12
Step-by-step explanation:
<u>Pythagoras’ Theorem</u>
a² + b² = c²
(where a and b are the legs, and c is the hypotenuse, of a right triangle)
From inspection of the triangle:
- leg a = a
- leg b = 9
- hypotenuse c = 15
Substituting these values into the formula and solving for b:
⇒ a² + 9² = 15²
⇒ a² + 81 = 225
Subtract 81 from both sides:
⇒ a² + 81 - 81 = 225 - 81
⇒ a² = 144
Square root both sides:
⇒ √(a²) = √(144)
⇒ a = 12
