Answer:
Step-by-step explanation:
t + u = 11 ----------- (1 )
10t + u = 10u + t - 9
10t + u - 10u - t = -9
10t - t + u - 10u = - 9
Combine like terms
9t - 9u = -9
Divide the entire equation by 9

t - u = -1 --------------(2)
Add equation (1) & (2) and so, u will be eliminated and we can find the value of t
(1) t + u = 11
(2) <u>t - u = -1</u>
2t = 10
t = 10/2
t = 5
Plugin t = 5 in equation (1)
5 + u = 11
u = 11 - 5
u = 6
The original number is 56
Answer: k= -13/2 or k = 5
Step-by-step explanation:
Answer:
I believe C
Step-by-step explanation:
hope this helps
we are given

Firstly, we will plug t=0 and t=2
Calculation of r(0):


Calculation of r(2):



Average velocity:
now, we can use formula

now, we can plug values


..............Answer