Answer:
They are at the same height at 1.13 seconds.
Step-by-step explanation:
Remark
The rockets are at the same height when  f(x) = g(x) [see below] are the same. So you can equate them.
Givens
f(x) = - 16x^2 + 74x + 9
g(x) = -16x^2 + 82x              I have changed this so you don't have 2 f(x)s
Solution
- f(x) = g(x)
- -16x^2 + 74x + 9 = -16x^2 + 82x                        Add:  16x^2 to both sides
- -16x^2+16x^2+74x + 9 = -16x^2+16x^2 + 82x   Combine terms
- 74x + 9 = 82x                                                     Subtract 74x from both sides
- 74x - 74x + 9 = 82x - 74x                                  Combine
- 9 = 8x                                                                 Divide by 8
- 9/8 = 8x/8
- x = 1 1/8                                                              Convert to decimal
- x = 1.125
- x = 1.13  [rounded] 
 
        
             
        
        
        
The second in the top row is this:
42.4-1.5(TIMES)3.1
     42.4-46.5
           -4.1
        
             
        
        
        
The answer to this question is A, the graphs y intercept is 5
        
             
        
        
        
Answer:
D is true, E is true, F is true
Step-by-step explanation:
Hello,
n is an odd number it means that n = 2a+1 where a is integer
A

this is <u>not</u> an odd number
B

this is <u>not</u> an odd number
C

this is <u>not</u> an odd number
D

so this is an odd number
E

so this is an odd number
F

this is an odd number
hope this helps