If the factors of a quadratic function are (x + 2) and (x − 9), what are the x-intercepts of the function?

A.
(-9,0) and (-2,0)
B.
(-2,0) and (9,0)
C.
(2,0) and (9,0)
D.
(-9,0) and (2,0)

Answer

m=100/4-S

Step-by-step explanation:

Step-by-step explanation:

here it is.Hope it helps

Answer:

1

Step-by-step explanation:

√4x+1=3

√4x = 3 - 1

√4x = 2

squaring both sides,

(√4x)² = 2²

4x = 4

x = 4/4

x = 1

Answer:

The most she can use in a day is $4.55.

Step-by-step explanation:

The explanation is simple.

22.75 divided by 5 = 4.55

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Answer:

$4.55

Step-by-step explanation:

All you do is take the total amount Sadie has right now and divide it by how many days it needs to last.

$22.75/5=$4.55

So Sadie can only spend $$.55 a day for the 5 days.

Answer:

5770 feet

Step-by-step explanation:

The height of the wall under the Waters proposal is 20 feet and the height of the wall under the Barrett proposal is 34 feet and its perimeter is 9809 feet. Since there is an increase in the dimensions of the wall, we find this percentage increase.

So, the percentage increase in the height of the wall is thus (New height - Old height)/Old height × 100%

New height = 34 feet and Old height = 20 feet

So, Percentage increase = (New height - Old height)/Old height × 100% = (34 ft - 20 ft)/20 ft × 100 % = 14/20 × 100% = 7/10 × 100% = 70 % increase.

Since all the dimensions increase by the same amount, the perimeter in the Waters proposal increases by 70% to the perimeter in the Barrett proposal.

Let P = perimeter in the Waters proposal and P' = perimeter in the Barrett proposal.

So, the percentage increase in perimeter is

(P' - P)/P × 100 % = 70 %

We now find P

(P' - P)/P = 70%/100%

(P' - P)/P = 0.7

P' - P = 0.7P

P' = 0.7P + P

P' = 1.7P

P = P'/1.7

So, substituting the value for P' = 9809 feet

P = P'/1.7

= 9809 ft/1.7

= 5770 feet

So, the perimeter of the wall under the Waters Proposal is 5770 feet.

Answer:

D. +3.82

Step-by-step explanation:

The computation of the test static for this test is shown below:

Data provided in the question

[tex]\bar x[/tex]= $8,745

[tex]\mu[/tex] = $8,500

[tex]\sigma[/tex] = $1,200 and n = 350

Now based on the above information, the test static for this test is

[tex]z = \frac{\bar x - \mu}{\frac{\sigma}{\sqrt{n} } }[/tex]

[tex]z = \frac{\$8,745 - \$8,500}{\frac{\$1,200}{\sqrt{350} } } \\[/tex]

= 3.82

= +3.82

Hence, the test static for this test is +3.82

We simply applied the above formula so that the correct value could come

And, the same is to be considered  

Answer:

-3x

Step-by-step explanation:

Subtract 2 from 5

Hope this helped, Have a great day!!

Answer:

-3x

Step-by-step explanation:

Combine like terms. Like terms are terms with the same amount of variables. Note that both terms (2x & -5x) both have one x in all.

Subtract the coefficients:

2x - 5x = -3x

-3x is your answer.

~

Answer:

30 ft. x 55ft

Step-by-step explanation:

3 x 5.5

1 inch = 10 ft

3 * 10 = 30

5.5 = 55

30' x 55'

Answer:

x = 26

Step-by-step explanation:

Alternate exterior angles are always congruent

3x - 8 = 70

Add 8 to both sides;

3x = 78

Divide both sides by 3;

x = 26

Answer:

4 and 8 because that's math, theres no other answer.

Answer:

2 plus 2 is 4 and 4 plus 4 is 8

Step-by-step explanation:

Answer:

option b is the correct answer

225 feet for 3 minutes

for 1 minute, 225/3

=75

Answer:

Book = $8 each

CD = $5 each

8 x 5 = 40

2 x 5 = 10

= 50

8 x 2 = 16

5 x 3 = 15

= 31

Please mark as brainliest.

Answer:

One book equals $8 and one CD equals $5

Step-by-step explanation:

Let books be denoted as 'x' and CDs as 'y'

5x + 2y = 50    ...1

2x + 3y = 31    ...2

I usually eliminate the y variable, and to do this, you multiply the first equation by 3 and the second equation by 2, because the lowest common multiple between 2 and 3 is 6.

...1*3    and    ...2*2

15x + 6y + 150    ...3

4x + 6y = 62    ...4

Eliminate y by taking ...4 away from ...3

15x - 4x = 150 - 62

11x = 88

x = 8

Sub this value into ...1

5(8) + 2y = 50

40 + 2y = 50

Rearrange

2y = 50 - 40

2y = 10

y = 5  

This means that one book is $8 and one CD equals $5

Answer:

c

Step-by-step explanation:

Answer:

Hello dear asker, you have to put the picture of the graph, then I would be happy to help

Step-by-step explanation:

y = 2x + 6 means that the letter Y equals 2x plus 6. So add 2 and 6 which gives you 8 and you are with this: 8x or 8(x). If your teacher gave you the value of X multiply 8 by x since the eight is outside its parenthesis. Once you have that answer or just 8X put the result of 8x in the y box and the 8x in the x box (skip count from ther of which the value ur teacher gave u)

Use the same context with the next problem. Hope this helps.

Answer:

p(x) = (x-a)(x-b)(x-7) - a and b can be whatever you want, any real numbers

Step-by-step explanation:

If you plug in 7, you need to multiply the other two numbers by 0, which will result in 0. There are 3 factors since it must be a 3rd degree polynomial

Hope this helps! Please give brainliest!

Answer:

No it is false... Because negative number are smaller than positive number however possible numbers were very small

Answer:

No it is false... Because negative number are smaller than positive number however possible numbers were very small

Step-by-step explanation:

Answer: 2 + 6x

Step-by-step explanation:

i cannot do the graph here but you just have to put the amount deposited in this instance as the variable and you got your answer

Answer:

2+6

Step-by-step explanation:

Answer: Y = 7x+34

Explanation : if there are 7 beads per inch that means that for every inch there are 7 more beads. and the 34 for is an unchangeable factor that stays the same throughout the equation

Answer:

7x+34

Step-by-step explanation:

Answer:

incomplete question

Step-by-step explanation:

Answer: -8.16 to 15.84

Step-by-step explanation: Confidence Interval is an interval in which we are a percentage sure the true mean is in the interval.

A confidence interval for a difference between two means and since sample 1 and sample 2 are under 30, will be

[tex]x_{1}-x_{2}[/tex] ± [tex]t.S_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}} }[/tex]

where

x₁ and x₂ are sample means

t is t-score

[tex]S_{p}[/tex] is estimate of standard deviation

n₁ and n₂ are the sample numbers

The estimate of standard deviation is calculated as

[tex]S_{p}=\sqrt{\frac{(n_{1}-1)s_{1}^{2}+(n_{2}-1)s_{2}^{2}}{n_{1}+n_{2}-2} }[/tex]

where

s₁ and s₂ are sample standard deviation of each sample

Degrees of freedom is:

[tex]df=n_{1}+n_{2}-2[/tex]

df = 12 + 9 - 2

df = 19

Checking t-table, with 90% Confidence Interval and df = 19, t = 1.729.

The mean and standard deviation for 12 unlogged forest plots are 17.5 and 3.53, respectively.

The mean and standard deviation for 9 logged plots are 13.66 and 4.5, respectively.

Calculating estimate of standard deviaton:

[tex]S_{p}=\sqrt{\frac{(12-1)(3.53)^{2}+(9-1)(4.5)^{2}}{12+9-2} }[/tex]

[tex]S_{p}=\sqrt{\frac{299.07}{19} }[/tex]

[tex]S_{p}=[/tex] 15.74

The difference between means is

[tex]x_{1}-x_{2}[/tex] = 17.5 - 13.66 = 3.84

Calculating the interval:

[tex]t.S_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}} }[/tex] = [tex]1.729.15.74.\sqrt{\frac{1}{12} +\frac{1}{9} }[/tex]

[tex]t.S_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}} }[/tex] = [tex]27.21\sqrt{\frac{21}{108} }[/tex]

[tex]t.S_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}} }[/tex] = [tex]27.21\sqrt{0.194}[/tex]

[tex]t.S_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}} }[/tex] = 12

Then, interval for the difference in mean is 3.84 ± 12, which means the interval is between:

lower limit: 3.84 - 12 = -8.16

upper limit: 3.84 + 12 = 15.84

The interval is from -8.16 to 15.84.

Answer:

g(-4) = -1

g(-1) = -1

g(1) = 3

Explanation:

If you are given a function that is defined by a system of equations associated with certain intervals of x, just find which interval makes x true, and then substitute x into the equation of that interval.

For example, given g(-4), this is an expression which is asking for the value of the equation when x = -4. So -4 is not ≥ 2, so ¼x - 1 will not be used. -4 is also not ≤ -1 and ≤ 2, so -(x - 1)² + 3 will not be used either. So in turn, we will just use -1 which is always -1 so g(-4) will just be -1, right because there is no x variable in -1 so it will always be the same.

Using the same idea as before g(-1) is g(x) when x = -1 so -1 will not be a solution because -1 is not less than -1 (< -1). -1 is not ≥ 2 either so we will be using the second equation because -1 is part of the interval -1≤x≤2 (it is a solution to this inequality), therefore -(x - 1)² + 3 will be used.

As x = -1, -(x - 1)² + 3 = -(-1 - 1)² + 3 = -(-2)² + 3 = -4 + 3 = -1.

It is a coincidence that g(-1) = -1.

Now for g(1), where g(x) has an input of 1 or the value of the function where x = 1, we will not use the first equation because x = 1 → x < -1 → 1 < -1 [this is false because 1 is never less than -1], so we will not use -1.

We will use -(x - 1)² + 3 again because 1 is not ≥ 2, 1≥2 [this is also false]. And -1 ≤ 1 < 2 [This is a true statement]. Therefore g(1) = -(1 - 1)² + 3 = -(0)² + 3 = 3

10 times 7 = 70

10 - 6 = 4

70 + 4 = 74

Answer:

70x+4

Step-by-step explanation:

simplify the expression

tip: u can use mäthwäy next time ;) its really helpful

The correct answer of this question is;

A=(2x+4)

=2×37+4

=78

B=(2x-9)

=2×37-9

=65

Step-by-step explanation:

(2x+4)+(2x-9)+x=180(The sum of all angle of a triangle is 180°)

or,5x-5=180

or,5x=185

or,x=185/5

Therefore the value of x=37.

Answer:

$16.25

Step-by-step explanation:

7.50

+7.50

+7.50

+7.50

+7.50

36.50

then you have to do 3.25  *5=16.25

Answer:

Range: [−94,∞),{y∣y≥−94}

Answer:

5

Step-by-step explanation:

Answer:

5 and no

Step-by-step explanation:

i belive

It is 6 units because if you divide 9 by 3 you get 3 and you multiple that by 2 to make it 6:9 which is equal to 2:3

Answer: 8a + 2b + 19 is the answer

Answer:

= 8a +2b + 19

Step-by-step explanation:

Combine Like Terms:

(12a + −4a) + (3b + −b) + (19)

=8a + 2b + 19