The annual number of cases can be modeled using a quadratic equation y = 14x2 – 9x + 1. the variable x represents the number of years after 2008. the variable y represents the number of pertussis cases in year x. according to the equation, in what year can the county be expected to have 2,619 cases of pertussis?
Answer: Range is a set/group of y-value points of a function. If/when the dot is filled in, the number is included in the set. This is signified by a bracket []. If/when the dot is not filled in, the number is not included in the set. This is signified by a parentheses (). The range of this graph is [4,-9).
:)
Perimeter of the triangle is 30.75 inches.
Step-by-step explanation:
- Step 1: Given sides of the triangle = 11.25 in, 9.25 in, 10.25 in
- Step 2: Formula for perimeter of triangle = length of sides of the triangle
- Step 3: Substitute in the formula
Perimeter = 11.25 + 9.25 + 10.25
= 30.75 inches
Answer:
<h2>( 2 , 1 )</h2>
Step-by-step explanation:
2x - 2y = 2
<u>5</u><u>x</u><u> </u><u>+</u><u> </u><u>2</u><u>y</u><u> </u><u>=</u><u> </u><u>1</u><u>2</u>
7x = 14
<h3>
x = 2</h3>
(2x - 2y = 2)-5
<u>(5x + 2y = 12)</u><u>2</u>
-10x + 10y = -10
<u> 10x + 4y = 24</u>
14y = 14
<h3>
y = 1</h3>
x = 2
y = 1
(2,1)
