Answer:
The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.
Step-by-step explanation:
Normal variables
Normal variables have mean 
and standard deviation 
When we add normal variables, the combined mean is the sum of both means, and the standard deviation is the square root of the sum of both variances. The distribution is still normal.
In this question:
Verbal: 
.
Math: 
Combined:
The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.
Answer:
k^2/25
Step-by-step explanation:
(1/5k)^2
(k/5)^2
k^2/5^2
k^2/25
13/23% = 1300/23 (56.52)
<em>Therefore, 13 is 29% of 1300/23 (56.52)</em>
Answer:
Rene made = 90 on her math test
If she answer =20problems correctly
we know,
how many problem were there = ?
there where = 90-20
= 70
There where 70 problems
Answer:
(A) dependent variable
(B) Dependent variable
(C) independent variable
(D) independent variable
Step-by-step explanation:
F(x) is equivalent to y, so the first two equations are saying y+3 and y-3
The last two equations are saying y=x+3 and y=x-3
