Answer:
a) -1
Step-by-step explanation:
Slope is also known as the gradient
1. assign a value to x and solve for y:
when x = 2, y = 2
when x = 4, y = 0
2. Next, use the equation of a straight line to find the gradient
y = mx + c
y is the y-coordinate, m is the gradient, x is the x-coordinate, c is the point where the line crosses the y-axis, which is found by equating y to 0 and solving for x
so y = mx + c becomes 2 = m*2 + 4, which then becomes 2 = 2m + 4
2m = -2 (take 4 away from 2)
<u>m = -1 </u>
<h2>
Hello!</h2>
The answer is:
The missing step is the step shown in the last option:
D. 
<h2>Why?</h2>
To find which is the missing step, we need to remember that to cancel a square root, we need to elevate it, so:
Starting from the last step before the missing step, we have:

In order to calculate the value of the variable (x) we need to square both sides of the equation, since squaring a root will cancel the root.
We must remember the following properties:

Now, finding the missing step, we need to find what to do in order to get the expression of the following step.
So, squaring both sides of the equation in order to cancel the square root and isolate the variable, we have:

Hence, we found the the missing step is:
D. 
Have a nice day!
500 represents the initial amount of medication, since when t=0, a=500.
Answer:
1000 and 9000 and 40
Step-by-step explanation:
Answer:
Option 1
Step-by-step explanation:
-5/8, -1⅔, 0.8, ½
-5/8 = -0.625
-1⅔ is approximately -1.67
0.8
½ = 0.5
-1.67, -0.625, 0.5, 0.8
-1⅔, -⅝, ½, 0.8