Step-by-step explanation:
Given
w(x) = - 3x - 4
Now
w(7) = - 3 * 7 - 4
= - 21 - 4
= - 25
Hope it will help :)❤
For the first one i am assuming that your are multiplying 4 by 5 which equals 20.
Forr the second one I am assuming the same, 4 by 32 which 128.
Answer:
Variance σ² having standard deviation 2.5 is 6.25.
Step-by-step explanation:
The standard deviation is basically the square root of the variance.
So, if want to find the variance of the data we simply take square of standard deviation to get the variance of data.
standard deviation = σ = 2.5
taking square on both sides
(σ)² = (2.5)²
σ² = 6.25
So, variance σ² having standard deviation 2.5 is 6.25.
Answer: 2/15 of the grade 8 students play woodwind instruments
Multiply the two fractions together: 1/3*2/5= 2/15