Which way does the parabola open for the quadratic
f(x)=-x^2+2x+9f(x)=−[tex]x^{2}[/tex]+2x+9

Answers

Answer 1

??? What do you mean???


Related Questions

140 apples increased by 45%

Answers

Answer:

The answer is 196 apples

Step-by-step explanation:

Surgery Satisfaction Survey
Surgery Satisfied Dissatisfied Total
Knee 70 25 95
Hip 90
15 105
Total 160 40 200
The table shows survey results for 200 patients who had either hip or knee surgery. If one person is selected randomly, what is the
probability he or she was dissatisfied, given that he or she had hip surgery? (Round to the nearest tenth of a percent.)
A)
44.2%
B)
38.6%
0
21.7%
D)
14.3%

Answers

Answer: D) 14.3%

Step-by-step explanation:

Conditional probability formula:

[tex]P(B |\text{given that A}) =\dfrac{P(A\ and\ B)}{P(A)}[/tex]

So, The probability he or she was dissatisfied, given that he or she had hip surgery = [tex]\dfrac{\text{Number of persons are dissatisfied and has hip surgery}}{\text{Total persons have hip surgery}}[/tex]

From the table, the number of persons who are dissatisfied and has hip surgery = 15

Total persons have hip surgery = 105

Required probability = [tex]\dfrac{15}{105}\approx0.143[/tex]

In percent, Required probability = 14.3%

Correct option D) 14.3%

HELP plesse with 9 and 10

Answers

Answer:

Find the solutions below

Step-by-step explanation:

Given the equation

y = -x^2 + 2x + 7

y = -2x+2

Equating both expressions

-x^2 + 2x + 7 = -2x + 2

-x^2 + 2x + 7 + 2x - 2 = 0

-x^2 + 4x + 5 = 0

Multiply through by -1

x^2 - 4x - 5 = 0

Factorize

x^2 - 5x + x - 5 = 0

x(x-5)+1(x-5) = 0

(x+1)(x-5) = 0

x+1 = 0 and x - 5 = 0

x = -1 and 5

when x = -1

y = -2x+2

y = -2(-1)+2

y = 2+2

y = 4

when x = 5

y = -2(5)+2

y = -10+2

y = -8

Hence the solutions are (-1, 4) and (5, -8)

b) y = x^2-3x-27

y = x - 6

Equating both expressions

x^2-3x-27 = x - 6

x^2-3x-27 - x + 6 = 0

x^2-4x-21 = 0

x^2 - 7x + 3x - 21 = 0

x(x-7)+3(x-7) = 0

(x+3)(x-7) = 0

x = -3 and 7

when x = -3

y = -3-6

y = -9

when x = 7

y = 7 - 6

y = 1

Hence the required solutions are (-3, -9) and (7, 1)

SOLVE FOR THE BASE

1. 10% of ________-8
2.28 is 4% of _________
3.25% of ________
4.13% of______
5.15 is 12.5% of _____​

Answers

Answer:

1-    10% of -80 is -8.  

2-    28 is 4% of 700.

3-   25% of a number is equal to 1/4 or 0.25 of it.

4-    13% of a number is equal to 0.13 of it.

5-    15 is 12.5% of 120.

Step-by-step explanation:

1. 10% of ________- 8

2.28 is 4% of _________

3.25% of ________

4.13% of______

5.15 is 12.5% of _____

To determine the missing numbers in the statements, the following calculations must be performed:

1-

10 = -8

100 = X

100 x -8 / 10 = X

-800 / 10 = X

-80 = X

Therefore, 10% of -80 is -8.

two-

4 = 28

100 = X

100 x 28/4 = X

2800/4 = X

700 = X

Therefore, 28 is 4% of 700.

 

3-

25% of a number is equal to 1/4 or 0.25 of it.

4-

13% of a number is equal to 0.13 of it.

5-

12.5 = 15

100 = X

100 x 15 / 12.5 = X

1500 / 12.5 = X

120 = X

Therefore, 15 is 12.5% of 120.

Which expression is equivalent to sin (1) cos(17) - cos (1) sin(15.)?

Answers

Answer:

os 36°: The cosine of 36 degrees can be calculated by using a pentagon. ... sin 18° and sin 72°: Taking the equivalent sine and cosine values of 15° and 18° on ... I angle (the "I" in this expression stands for th

Step-by-step explanation:

Help please, thank you :)

Answers

Answer:

Equation B, 10 + 5.50n = y.

Step-by-step explanation:

N is the pounds of shrimp that were purchased. This has no set value, it can change at any time.

Since each pound of shrimp is $5.50, if you wanted to buy 10 pounds of fish you'd pay $55.

If I wanted to write an equation to find the total amount of money that I'd need to pay for n pounds of shrimp, I would use the equation 5.50n. (I don't know if this makes sense lol I'm terrible at explaining ;-;)

Now, it states that he wants an extra 10 dollars to pay for expenses. On top of the 5.50n, he wants an extra $10.

You need to add 10 to 5.50, in order to get the total amount, or y.

The final equation is going to be 5.50n + 10 = y, or choice B.

Which of the following characteristics does not describe a stock?
O A. No guarantee you will get your money back
B. No maturity date
C. Money can be earned from capital gains
O D. No certificate of ownership

Answers

Answer:

D. No certificate of ownership

What is y-1 =2/3(x+3) in slope intercept form?

Answers

Answer:

The slope is just 2/3 and the y intercept is (0,3)

A pair of dice is rolled and the numbers showing are observed. Find the probability that the two dice show different numbers.

Answers

Answer:

1/36

Step-by-step explanation:

what is the Circumference of
r = 126 cm
C =?

Answers

Answer:

C≈791.68

Step-by-step explanation:

C=2πr=2·π·126≈791.68135

What is the End Behavior of the following Graph?

Answers

Answer:

b hopefully this helps you with work

please help will mark brainliest

Answers

Answer: the answer is 29.3

Step-by-step explanation:

A bag contains 20 marbles - 10 blue and 10 red. What is the probability of selecting 2 blue marbles at random with replacement? *

Answers

Answer:

I dot know how you want the answer but the are all correct 2/20 or 10% or 0.10

Step-by-step explanation:

13- (-9)

explain how you got this answer

16+ only please answer this

Answers

Answer:

22

Step-by-step explanation:

double negative is a plus sign

13--9=22

Answer: 22

Step-by-step explanation:

Here, we need to know the concept of changing signs. Under any circumstances, if there is a "-" sign outside of parenthesis, the signs inside need to be the opposite. If you are still not very clear, I can provide some examples below:

1-(+1) ⇒ there is a "-" sign, so we need to convert the sign inside "+" to "-" ⇒ 1-1 ⇒ 02-(-1) ⇒ there is a "-" sign, so we need to convert the sign inside "-" to "+" ⇒ 2+1 ⇒ 3

-------------------------------------------------------

Given

13 - (-9)

⇒There is a "-" sign outside

⇒We need to convert the sign inside "-" to "+"

⇒13+9

⇒22

Hope this helps!! :)

Please let me know if you have any questions

Pls help with this I have limited time

Answers

Answer:

x = 8

z = 86

Step-by-step explanation:

6x + 46 = 13x - 10        (Because they're vertical angles)

6x - 13x = -10 - 46

-7x = -56

x = 8

6x + 46

6(8) + 46

94

z + 94 = 180

z = 86

the x and y axis are tangent to a circle with radius 3 units. write a standard equation of the circle.

Answers

Given:

The x and y axis are tangent to a circle with radius 3 units.

To find:

The standard form of the circle.

Solution:

It is given that the radius of the circle is 3 units and x and y axis are tangent to the circle.

We know that the radius of the circle are perpendicular to the tangent at the point of tangency.

It means center of the circle is 3 units from the y-axis and 3 units from the x-axis. So, the center of the circle is (3,3).

The standard form of a circle is:

[tex](x-h)^2+(y-k)^2=r^2[/tex]

Where, (h,k) is the center of the circle and r is the radius of the circle.

Putting [tex]h=3,k=3,r=3[/tex], we get

[tex](x-3)^2+(y-3)^2=3^2[/tex]

[tex](x-3)^2+(y-3)^2=9[/tex]

Therefore, the standard form of the given circle is [tex](x-3)^2+(y-3)^2=9[/tex].

2x + x + 24=180 ????

Answers

3x + 24 = 180

3x = 180 - 24

3x = 156x = 156/3

x=52

HELP ASAP!!!! Giving brainliest to whoever answers first!! No links please. :))

Answers

Answer:

45 points

Step-by-step explanation:

Average= sun of all numbers/ no. of numbers

33= (23+35+27+48+18+35+x)/7

33= 186+x/7

33×7= 186+ x

231= 186+x

x= 231- 186

x= 45

Answer:

45 points, he scored 45 points in game 7

Step-by-step explanation:

Right now, the average, or mean, is (23 + 35 + 27 + 48 + 18 + 35)/6 = 31

The number plus 23 + 35 + 27 + 48 + 18 + 35 and then divided by 7 should equal 35, that number is 45

(23 + 35 + 27 + 48 + 18 + 35 + 45)/7 = 33 = 231/7 = 33 = 33 = 33

To find the mean, you add all the numbers and then divide it by the amount of numbers there.

Please hurry!
I need both parts by tonight!

Answers

Answer:

okokookokokokjfdgugv

Given: Circle A externally tangent to Circle B. How many possible common tangents to circles A and B can exist? 2 3 4

Answers

Answer:

3

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

4. A taxi ride costs $9.25. The driver charges a flat rate of
$2.25 just to enter the car. If each mile costs.50, how
many miles did you ride?

Answers

Answer: 14

Step-by-step explanation:

9.25-2.25 = 7/.5= 14

my number is a multiple of 6 what 3 other numbers must be a multiple of

Answers

Answer:

6 12 36

Step-by-step explanation:

im not sure -_- ....

Answer:

1,2,3

Step-by-step explanation:

Take the prime factorization of 6, that will be 1,2,3. Those will be the answers for any multiple of 6. Example:18-->multiple of 1,2,3,6,9,18.

the perimeter is ___ units​

Answers

15 is the correct answer

seven multiplied to the sum of twelve and four

Answers

I think the answer is 112

Answer:

I think answer is the 112

in a box of chocolates, 1/5 of the chocolates contain nuts.
the rest of chocolates do not contain nuts.
write down the ratio of the number of chocolates that contain nuts to the number of chocolates that do not contain nuts.
give your answer in the form 1:n

Answers

Answer:

1:4

Step-by-step explanation:

chocolates that contain nuts = 1/5

chocolates hat do not have nuts = 4/5

ratio = 1:4

I hope im rght! i

:)

A wedding cake is made of three circular tiers, as shown below. The cake decorator is going to put one ring of frosting around the circumference of each tier. How many inches of frosting will the cake decorator need? Use 3.14 for pi and round to the nearest whole inch.

Answers

i think the answer is 24.1
The answer is going to be you have to times 3 by 3.14 then round so it will be 26

Can someone please help me with math.

Answers

I think its answer B) B

What are the x-coordinates of the solutions to this system of equations?
x2 + y² = 36
y = x - 6 (1 point)
Select one:
a. 2 and 0
b. 6 and 2
c. 6 and -2
d. 6 and 0

Answers

x^2+y^2=36
y=(x-6)
substitute y in first equation
x^2+(x-6)^2=36
x^2+x^2-12x+36=36
simplify and factor
2x(x-6)=0
so x=0, x=6

Number 12 please help 10 points no links pleAse

Answers

Answer:

C

Step-by-step explanation:

50

52

53

56

We have the 5 at the stem, so we need 0, 2, 3, and 6 at the leaf.

Describe and correct the error in writing an equation of the line with a slope of 2 and a y-intercept of 7.

Please don't put any links or I will report you.

Answers

Answer:

The mistake they made was they switched the slope and y-intercept.

The correct answer is y=2x+7 because when we write an equation in slope intercept form (y=mx+b) you replace m with the slope and b with the y-intercept.

Hope this helps! <3

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