So it is asking you to group like term so
x terms can be grouped/added/subtracted to other x terms, but not to x^2 or x^3 terms
x^2 terms to x^2 and so on so
1. 9-3k+5k=
9+(5k-3k)=
9+2k
2. k^2+2k+4k=
k^2+(2k+4k)=
k^2+6k=
Answer:
v = 85/t
Step-by-step explanation:
Velocity is the change in displacement of a body with respect to time. It is expressed as
velocity = displacement/time
v = d/t
Given
d = 85km
t = t
Substitute tis parameters into the function;
v = 85/t
Hence the velocity v as a function of travel time t in hours is expressed as;
v = 85/t
The variance for the sample is 25
For given question,
We have been given the sample size n = 21
and the sum of squares is SS = 500
We need to find the variance for the sample.
We know that the variance is mathematically represented as,
Substituting given values in the above formula,
= 500 / 20
= 25
So, the variance is 25
Therefore, the variance for the sample is 25
Learn more about the variance here:
brainly.com/question/15729903
#SPJ4
Answer:↓↓↓
Step-by-step explanation:
We are given that side AB is congruent to <u>BD</u>. We are also given that side AC is congruent to <u>CD</u>.
We know that side BC and side <u>CB</u> are congruent because of the <u>Reflexive</u> property.
Therefore, ΔABC and Δ<u>DBC</u> are congruent because of <u>SSS Postulate</u>.
Hope this helped!
Answer:
C=5.831
a=30.964
b=59.036
Step-by-step explanation:
