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3 years ago

Which of the following could be an equation of the form y=-x^3+ax^2+bx+c for some real numbers a,b,?

Mathematics

1 answer:

qwelly [4]3 years ago

6 0

Answer:

Bottom left graph

Step-by-step explanation:

<u>Given function:</u>

y = -x^3 + ax^2 + bx + c

This is a third degree function with negative leading coefficient.

This is therefore decreasing function and can have one local maximum and one local minimum.

From the given graphs we can see only bottom left one can be a matching one.

You might be interested in

Sum of numbers 12-111

liubo4ka [24]

Answer:

12-111=-99

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

For its 28th anniversary, an Uncles Game store is offering a 28% discount on all board games. What is the discounted cost of the

svetlana [45]

Answer: $23.40

Step-by-step explanation:

We will find what percent of the normal cost the items are currently.

100% - 28% = 72%

Now, we will find 72% of $32.50

72% -> 0.72

$32. 0 * 0.72 = $23.40

The discounted cost is $23.40.

5 0

2 years ago

The heights (in inches) and pulse rates (in beats per minute) for a sample of 40 women were measured. Using technology with the

Viktor [21]

Answer:

There is not sufficient evidence to support the claim that there is a linear correlation between the heights and pulse rates of women

Step-by-step explanation:

The correlation coefficient between the variables h(height in inches) and pulse rates (in beats per minute) is 0.202

Sample size n=40

Level of significane alpha = 0.01

Create null and alternate hypothesis as:

H0: r=0

Ha: r not equal 0

(Two tailed test at 1% significance level)

Sample r = 0.202

r difference = 0.202

test statistic t = $\frac{r\sqrt{n-2} }{\sqrt{1-r^2} } \\=\frac{0.202(\sqrt{38} )}{\sqrt{0.9592} } \\=\frac{1.25}{0.9794} \\=1.271$

df =n-2 =38

t critical value for 0.01 and df =38 is 2.704

Since our test statistic lies below 2.704, we accept null hypothesis

There is not sufficient evidence to support the claim that there is a linear correlation between the heights and pulse rates of women

7 0

3 years ago

Question 20 (5 points)

Sloan [31]

Answer:

Question 20 3 < c < 9

Question 21 2.5

Step-by-step explanation:

hope this helps u

3 0

2 years ago

A slope-intercept equation of the line whose graph is perpendicular to

omeli [17]

Step-by-step explanation:

let eqn be y = mx + b.

2x + 9y = 8

9y = -2x + 8

y = -2/9 x + 8/9

since the lines are perpendicular, product of the slope of the two lines = -1.

hence,

m x -2/9 = -1

m = 9/2

sub (0, -3):

-3 = 9/2(0) + b

b = -3

therefore equation is: y = 9/2x - 3

Topic: coordinate geometry

If you like to venture further, feel free to check out my insta (learntionary). It would be best if you could give it a follow. I'll be constantly posting math tips and notes! Thanks!

6 0

2 years ago