Answer:
mean of other sixteen numbers is 40
Step-by-step explanation:
let the total of 20 numbers be x
x/20 = 42
20×x/20 =42×20
x=840
let the total of four numbers be y
y/4=50
4×y/4 = 50×4
y=200
so as to get the difference of x - y
=840-200
=640
the average of sixteen numbers
=640/16
=40
therefore the mean of sixteen numbers is 40
Answer: 0.3
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
(f + g)(x) = f(x) + g(x)
f(x) + g(x)
= - 4x² - 6x - 1 + (- x² - 5x + 3) ← remove parenthesis
= - 4x² - 6x - 1 - x² - 5x + 3 ← collect like terms
= - 5x² - 11x + 2 → C
The answer is B) which is letter E . hope this helps <3
