Answer:
The car must have a speed of 25 kilometres per hour to stop after moving 7 metres.
Step-by-step explanation:
Let be 
, where 
is the stopping distance measured in metres and 
is the speed measured in kilometres per hour. The second-order polynomial is drawn with the help of a graphing tool and whose outcome is presented below as attachment.
The procedure to find the speed related to the given stopping distance is described below:
1) Construct the graph of 
.
2) Add the function 
.
3) The point of intersection between both curves contains the speed related to given stopping distance.
In consequence, the car must have a speed of 25 kilometres per hour to stop after moving 7 metres.
Answer:
-7
Step-by-step explanation:
-12x = 84
/-12 /-12
x = -7
The answer to this problem would be it would be a 20% discount
Answer:
7/2
Step-by-step explanation:
Answer: 10 units squared
Step-by-step explanation:
A square is a shape that has parallel, congruent sides, meaning that all sides are straight and have the same length.
We know that the area of a shape is the length times the width, and is measured in square units.
Taking all this into consideration, we set up a basic equation.
100 = a • a
10 units = a
