Answer:
(y - 2)²
Step-by-step explanation:
9y² - 12y + 4 ← is a perfect square of the form
(ax - b)² = a²x² - 2abx + b²
Compare like terms with 9y² - 12y + 4, thus
a² = 9 ⇒ a = 3
b² = 4 ⇒ b = 2 and
- 2ab = - 2 × 3 × 2 = - 12
Thus
9y² - 12y + 4 = (3y - 2)²
Answer:
The correct answer is:
C. Trisha is shorter than 75% of girls aged 16 to 18.
Step-by-step explanation:
When a dataset is divided into four equal parts, the first part is called the lower quartile. The data is usually sorted in ascending order before finding quartiles.
The lower quartile contains 25% of the whole data. The values in lower quartile are are less than 75% of the values.
If Trisha's height is in lower quartile that means her height is less than the girls in middle and higher quartile.
Hence,
The correct answer is:
C. Trisha is shorter than 75% of girls aged 16 to 18.
Answer:
C.
Step-by-step explanation:
