Answer:
The rocket will take 9.25 seconds to return to ground
.
Solution:
Given:
Initial velocity = 148 ft per seconds
Height "h" after "t" seconds is given by equation:
To find:
Time taken by rocket to return to ground =?
Solution:
The time taken by rocket to return to ground can found by substituting h(t) = 0 in the given equation.
Taking t outside
t(-16t + 148) = 0
Zero product property. The zero product property states that if a⋅b = 0 then either a or b equal zero. This basic property helps us solve equations like (x+2)(x-5) = 0
So for above equation we get,
t =
t = 9.25
When t = 0 , the rocket would not left the ground. So ignore t = 0
So t = 9.25
Answer:
B
Step-by-step explanation:
$79.20 is the correct answer.
Answer:
$36.75
Step-by-step explanation:
12.25×3=36.75
12.25 per hour to find 3 hours you multiply by 3 which is 36.75
I can tell that you are really frustrated since your worksheet is really crumpled XD I get you .
Part A:Expression 1 and 4
workings :
expression 1 : 9+5x-5+3x = 5x+3x+9-5(arrange like terms )
=8x+4
expression 4: 4(1+2x) (expand) = 4+8x
since 8x+4 is the same as 4+8x , expression 1 &4 is equal
PART B:EXPRESSION 3
given expression : 2x+9-x+3 =x+12
since expression 3 is x +12, expression 3 is equivalent to the expression given