Answer: c. 
Step-by-step explanation:
As per given , we have
Total number of residents injured from roller-skating =1,800
Total number of deaths from roller-skating = 90
Formula for Mortality rate : 
Then, the proportional mortality ratio (%) due to roller-skating was
=
= 5%
Hence, the correct answer is c.
Okay, I will give you the building blocks for solving this equation.
Now something you will need to remember is that a triangle will always add up to 180 degrees.
We can use y as that one unknown side in the triangle.
Knowing this, we can say (9x+16) + (6x+15) + y = 180
Then we can combine like terms like so : 15x+31+y = 180
There are two variables though. So we need more information.
Well, turns out we have the exterior angle of a straight line and the angle measures of a straight line must equal 180. We can now use (19x+3) + y = 180.
With both of these equations, you can now solve and find both of the angles
Answer:
D. star in the sky
Step-by-step explanation:
To be honest, none of them represent the plane but I think that's a better answer. OwO
The equations intersect at an infinite number of points. Infinite number of solutions.
<h3>What is elimination method?</h3>
According to the description of the elimination approach, it involves removing a phrase that contains any of the variables from the equation in order to simplify the calculations. To achieve this, multiply or divide a number by the equation(s) until all the variable terms' coefficients are the same.
The term is then eliminated or removed from the result by adding or subtracting from both equations. Because of this, the addition method is another name for the elimination approach.
Therefore,
Multiply each equation by the value that makes the coefficients of y opposite.
(6x - 4y = 4) - [2 × (3x - 2y = 1)]
= [(6x - 4y = 4) - (6x - 4y = 2)]
= 0 = 2
Hence, the equations intersect at an infinite number of points. Infinite number of solutions.
To learn more about elimination method, refer to
brainly.com/question/28405823
#SPJ1
Answer:
0.357
Step-by-step explanation:
The computation of the probability of sale for the last book that the bookstore should purchase for sale to a student is shown below
Probability is
= 1 - ((Cs ) ÷ (Cs + co))
= 1 - (($225 - $105) ÷ ($117 + ($105 - $40)))
= 1 - 0.6428
= 0.357
Here Cs represent the notional loss in the case when the demand is underestimated
And Co represent the notional loss in the case when the demand is overestimated
