10% = 50
30% = 150
1% = 0.5
2% = 1
150 + 1 = 151 books should be mysteries
You can purchase 6 books and 6 dvds (you can get 6 combinations) for $162
Answer:
1) Mean 2) Mean 3) Spread
Step-by-step explanation:
In the Normal Distribution (Bell Shaped) the Mean, Mode, and Median coincide and they are the longest axis in the middle of the curve. Therefore the Mean is the center of the Distribution, and the Standard Deviation and other Measures of Spread (Standard Deviation, Variance) show us how the data vary, i.e. the variability of the data collected.
11a = 18a + 21
11a - 18a = - 18a + 21
-7a = 21
7a = -21
a = -21/ 7
a = -3
Answer:
(3, 0 )
Step-by-step explanation:
Given a parabola in standard form
y = ax² + bx + c (a ≠ 0 )
Then the x- coordinate of the vertex is
= -
y = 5x² - 30x + 45 ← is in standard form
with a = 5, b = - 30 , then
= - = 3
Substitute x = 3 into the function for corresponding value of y
y = 5(3)² - 30(3) + 45 = 45 - 90 + 45 = 0
vertex = (3, 0 )