Answer:
The answer is 78%
Step-by-step explanation:
Step 1: The given regression equation y = -0.414x + 106.55
Step 2: The length of the film = 70 minutes
Step 3: Plug in x = 70 in the given equation and find the value of y.
y = -0.414 (70) + 106.55
y = -28.98 + 106.55
y = 77.57
Y = 78%
Hope you will understand. :)
Answer:
216 boys
Step-by-step explanation:
450 students: 20% girls, 80% boys
450*20%=90 girls
450*80%=360 boys
Students having mobile phones: 40% (OF THE 90) girls, 60% (OF THE 360) boys
90*40%=36 girls
360*60%=216 boys
[We honestly don't need to care about the girls without mobile phones as they are only asking how many boys have mobile phones]
Answer:
Step-by-step explanation:
For this case you must simplify the expression respecting the rules of multiplication of mathematics.
The steps to simplify the expression are the following:
First multiply what is in the parentheses
-2x ^ 2 (x - 5) + x (2x ^ 2 - 10x) + x
-2x ^ 3 + 10x ^ 2 + 2x ^ 3 - 10x ^ 2 + x
Then add the terms that have the same exponent
(-2x ^ 3 + 2x ^ 3) + (10x ^ 2 - 10x ^ 2) + x
x
The final simplification is
x
answer
x