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vampirchik [111]
2 years ago
9

Select the correct answer. This graph represents a quadratic function. What is the value of a in this function’s equation? A)-1

B)2 C)1 D)-2

Mathematics
2 answers:
Alchen [17]2 years ago
8 0

Answer:

-2

Step-by-step explanation:

Schach [20]2 years ago
5 0

Answer:

Step-by-step explanation:

We will use the work form of a quadratic to determine what a is...in fact we will write the equation for the whole thing in the process, because it's part of solving for a.

y = ±|a|(x - h)² + k

where x and y are from a coordinate point on the graph, h and k are the coordinates of the vertex, the absolute value of a indicates how steep or flat the graph is compared to the parent graph, and the ± is because a positive parabola opens up and a negative one opens upside down.

The vertex is (0, 9) and the coordinate point I chose to use is (3, 0). Filling those in and solving for a:

0 = ±|a|(3 - 0)² + 9 and

0 = ±|a|(3)² + 9 and

-9 = ±|a|9 and

-1 = ±|a| so a = 1. Because this is an upside down parabola the negative is out front, but a is independent of it. The correct choice is C. The quadratic function is

y=-x^2+9 or in more detailed form:

y=-(x-0)^2+9

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Since an equilateral triangle has 3 equal length sides, and in this case the total of these 3 sides is 24cm, the length of one side is 24/3 = 8cm
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The sum of two prime numbers
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The sum of the two prime numbers is 85. This is an odd number. According to the Rule, the sum of the even prime number and the odd prime number is called an odd number.
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The measurement of the width of a garden plot is 44 m. Its actual width is 45.5 m.
romanna [79]
Answer:  -3.3%

By not knowing how i did it, means you will still not know how to do it next time you encounter a similar problem.

Knowing how to solve a problem is just as important or even more important than just knowing the solution.

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3 years ago
PLEASE ANSWER + BRAINLIEST!!!!
Verizon [17]

Answer: 2526 dollars

=============================

Work Shown:

Plug n = 400,000 into the function and simplify

f(n) = 939 + 5.29*(n-100,000)/(1,000)

f(400,000) = 939 + 5.29*(400,000-100,000)/(1,000)

f(400,000) = 939 + 5.29*(300,000)/(1,000)

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3 0
3 years ago
A test is normally distributed with a mean of 70 and a standard deviation of 10. Todd scores a 55 on the test. Select the answer
Jlenok [28]

Answer:

Todd's Z-score is - 0.27    

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<u><em>Step(i)</em></u>:-

Given data A test is normally distributed with a mean of 70 and a standard deviation of 10.

<em>Mean of the population 'μ' = 70 </em>

<em>Standard deviation of the Population ' σ ' = 10</em>

<em>let 'x' be the random variable in normally distributed</em>

<u><em>Step(ii)</em></u>:-

<em>Given raw score  'x' = 55</em>

Todd's Z-score

                      Z = \frac{x-mean}{S.D}

                     Z = \frac{55-70}{55}

                     Z = -0.27

<u><em>Final answer</em></u>:-

<em>Todd's Z-score is - 0.27        </em>            

6 0
3 years ago
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