please solve this question ​

Answer:

choice C. 0 no real solution

Step-by-step explanation:

y=-3x^2+7x+6

using the formula for discriminant

D =  b^2 - 4ac

D = 7^2  -  4*3*6

D = 49  - 72  < 0

no real solutions

Given:

[tex]$\frac{\left(\frac{a^{2}-b^{2}}{a b}\right)}{\left(\frac{1}{b}-\frac{1}{a}\right)}[/tex]

To find:

The simplified expression.

Solution:

[tex]$\frac{\left(\frac{a^{2}-b^{2}}{a b}\right)}{\left(\frac{1}{b}-\frac{1}{a}\right)}[/tex]

Apply the fraction rule: [tex]\frac{\frac{y}{z}}{x}=\frac{y}{z \cdot x}[/tex]

[tex]$\frac{\left(\frac{a^{2}-b^{2}}{a b}\right)}{\left(\frac{1}{b}-\frac{1}{a}\right)}=\frac{a^{2}-b^{2}}{a b\left(\frac{1}{b}-\frac{1}{a}\right)}[/tex]  ------------ (1)

Let us simplify [tex]\frac{1}{b}-\frac{1}{a}[/tex].

LCM of a and b = ab

Adjacent fraction based on the LCM

[tex]\frac{1}{b}-\frac{1}{a}=\frac{a}{a b}-\frac{b}{a b}[/tex]

         [tex]=\frac{a-b}{a b}[/tex]

Substitute this in equation (1).

         [tex]$=\frac{a^{2}-b^{2}}{\frac{a-b}{a b} a b}[/tex]

Common factor ab get canceled.

         [tex]$=\frac{a^{2}-b^{2}}{a-b}[/tex]

Apply the algebraic formula: [tex]x^{2}-y^{2}=(x+y)(x-y)[/tex]

         [tex]$=\frac{(a+b)(a-b)}{a-b}[/tex]

Cancel the common factor a - b, we get

         [tex]=a+b[/tex]

The simplified expression is a + b.

Answer:

25

step by step explanation:

Answer:

d - c = -10y^2 -y -10

Step-by-step explanation:

-7y^2 - 3y^2 = - 10y^2

3y- 4y = -1y or -y

-6 - 4 = -10

Answer:

-10y^2 - y - 10

Step-by-step explanation:

First put them in order:

(-7y^2+3y-6)-(3y^2+4y+4)

Then distribute the negative to the second set of parentheses:

-7y^2+3y-6-3y^2-4y-4

Then simplify leaving you with the answer

-10y^2 - y - 10

The expression which is false in determining the volume of the cylinder is given by V₁ = π . 3 . 12²

A cylinder is a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface. The center of the circular bases overlaps each other to form a right cylinder. The volume of a cylinder is

Volume of Cylinder = πr²h

Surface area of cylinder = 2πr ( r + h )

where r is the radius of the cylinder

h is the height of the cylinder

Given data ,

Let the volume of the 12 cylinders be V

Let the height of the cylinder be h = 1 cm

Let the radius of the cylinder be r = 3 cm

Now , Volume of Cylinder = πr²h

On simplifying , we get

Volume of the cylinder V = 12 x ( π x 3² x 1 )

Volume of the cylinder V = π x 3² x 12 cm³

Volume of the cylinder V = 108π cm³

So , the expression V₁ = π . 3 . 12² is false and cannot be used to determine the volume of the cylinder

Hence , the volume of cylinder is 108π cm³

To learn more about cylinder click :

https://brainly.com/question/16134180

#SPJ3

The complete question is attached below :

Twelve disks with the given measurements are stacked on top of each other. Which expression does NOT give the volume of the cylinder that is formed?

Answer:

parallelogram

Step-by-step explanation:

Answer:true

Step-by-step explanation:if there are more than one arrow coming from the x value which is the one to the left then it would be false .It doesn't matter if there are multiple arrow on the y values tho. Which is the one to the right.

Answer:

2n=-4

Step-by-step explanation:

Let he number be n

N×2=-4

Further explanation

If we are to solve

Divide both sides by 2

n=-2

Answer:

2n=-4

Step-by-step explanation:

Make sure to give the other person brainliest!

Answer:

9 seconds after the object is launched

Step-by-step explanation:

The function models the height of the object as a function of the time after the object is launched. Therefore h(t) will be zero, and you will solve for t like a normal quadratic equation.

0 = -4t² + 16t + 180

First, you can factor out the -4 from all the terms.

0 = -4(t² - 4t - 45)

Next, factor what is inside the parentheses

0 = -4 (t + 5) (t - 9)

Then you set each of the factors individually to zero and solve

t + 5 = 0 and t - 9 =0

From this we get that time is:

t = -5 and t = 9

Now that time cannot be negative, we figure out that the time is 9 seconds, therefore the object will hit the ground after 9 seconds.

Answer:

55440 different arrangements

Step-by-step explanation:

The answer is:

11 x 10 x 9 x 8 x 7

Which is equal to 55440 different arrangements

Support me by marking my answer as brainiest

Mac can create 55,440 different arrangements by using 5 out of his 11 pictures, calculated using the permutation formula P(11, 5).

The question asks how many different arrangements Mac can make using 5 out of 11 different pictures. To calculate this, we use the concept of permutations which is given by the formula P(n, r) = n! / (n-r)!, where n is the total number of items, and r is the number of items to arrange.

In this case, Mac has 11 pictures (n = 11) and wants to arrange 5 of them (r = 5). Thus, the number of arrangements (permutations) can be found by the calculation: P(11, 5) = 11! / (11-5)! = 11! / 6!, which equals 11 x 10 x 9 x 8 x 7 = 55,440 different arrangements.

Answer:

0,1

2,4

3,8

Are all the solutions that apply to the graph

Step-by-step explanation:

Hope this will help u...

Answer:

>

Step-by-step explanation:

I had this question once sorry i'm late but -1/4) -2/5 = 1/10 , - 5/6 ÷1/8 = -6 and a fraction I keep forgetting so( -1/4) -2/5  > - 5/6 ÷1/8 )

Answer:

the number of caffeine still in his system by 9:00 am is 192 mg.

Step-by-step explanation:

given information

the mass of initial caffein, m₁ = 300 mg

time, t = 9 - 6 = 2 hours

metabolised = 18%/hour = 0.18/h = 0.18 x 300 mg = 54 mg/h

the student metabolised the caffeine 54 mg/h. thus from 6 am to 9 am the caffeine metabolised is

metabolised in 2 hr = 2 x 54

                                 = 108 mg

the remaining caffeine = initial caffeine - metabolised caffeine

                                      = 300 - 108

                                      = 192 mg

Answer:

The correct answer is 138 mg.

Step-by-step explanation:

To understand this problem we must first analyze it.

We know that the student's body metabolizes 18% of the caffeine ingested every hour.

Therefore we can solve that percentage to already have the number of metabolized caffeine per hour:

(300. 18): 100 =

5400: 100 = 54 mg

We now know that the student's body will metabolize 54 mg of caffeine per hour.

The question is much caffeine is still in his system by 9:00 am?

From 6:00 am to 9:00 am we have 3 hours of difference: 3 . 54 = 162

In three hours 162 mg of caffeine were already processed by his body, therefore, it still needs to be metabolized: 300 - 162 = 138 mg.

Given:

Perimeter of the figure = 18.6 inches

To find:

The length of n.

Solution:

Perimeter of the figure = 18.6 inches

Perimeter = Sum of the sides

3 + 6.3 + 4.5 + n = 18.6

13.8 + n = 18.6

Subtract 13.8 from both sides.

13.8 + n - 13.8 = 18.6 - 13.8

n = 18.6 - 13.8

n = 4.8

The length of n is 4.8 inch.

Answer:

2.83

Step-by-step explanation:

this is the approach i would take to solve this;

take the amount of money the almonds are and divide how many grams that would consist of

23.41 / 825 =

0.02837576 this is the price for 1 gram of almonds.

take this number and multiply by 100 to find how much 100g would cost.

0.0283 * 100 = 2.83

the price of 100 grams is 2.83

i hope this helped you!

:)

The price per 100 grams of almonds is 2.837 when dividing the total cost of 23.41 by the weight of 825 grams and then multiplying the result by 100.

To find the price per 100 grams of almonds, we will first need to calculate the cost per gram and then multiply it by 100 to get the cost for 100 grams. Here is how you can do it:

Let's calculate it step-by-step:

Therefore, the price per 100 grams of almonds is 2.837.

Answer:31.42

Step-by-step explanation:First you need to find the radius of the circle,so you know the radius is half of the diameter,so you take the radius(2) and multiplys by the pi which is 3.14 the formula is r^ x π

Answer:

31.4 in^2

Explanation:

The Formula for finding circumference is π*d (d=Diameter) or in this case 3.14*d. all you have to do is plug in 10 into the formula and get 3.14*10= 31.4 in^2

Answer:

44/1/2

Step-by-step explanation:

Answer:

8

544+65+6+6+646546141

Answer:

Step-by-step explanation:

It it 7 becaues the base is 3 then 7 x 3 = 21

Answer:

[tex]k < -8[/tex]

Step-by-step explanation:

Step 1:  Subtract 5 from both sides

[tex]k + 5 < -3[/tex]

[tex]k + 5 - 5 < -3 - 5[/tex]

[tex]k < -8[/tex]

Answer:  [tex]k < -8[/tex]

Answer:

K < -8

Step-by-step explanation:

K + 5 < -3

Subtract 5 from each side

K + 5-5 < -3-5

K < -8

Answer:

None of these solutions

Step-by-step explanation:

Substitute the values for x and y into the equation and see if they work out:

2(1)+3(4)=8

14 is not equal to 8, so (1,4) is not a solution.

2(1)+3(-4)=8

-10 is not equal to 8, so (1, -4) is not a solution.

2(4)+3(1)=8

11 is not equal to 8, so (4,1) is not a solution.

You repeated the first option as the last one but with a period instead for some reason, perhaps a typo?

Answer:

0.039

Step-by-step explanation:

There is a probability of 3.94% that a randomly selected score on the verbal section is higher than 165

The z score is used to show by how many standard deviations the raw score is above or below the mean. It is given by:

z = (raw score - mean)/standard deviation

Given that mean of 150 and a standard deviation of 8.5. Hence:

For x > 165

z = (165 - 150)/8.5 = 1.76

P(z > 1.76) = 1 - P(z < 1.76) = 1 - 0.9606 = 0.0394

There is a probability of 3.94% that a randomly selected score on the verbal section is higher than 165

Find out more on z score at: https://brainly.com/question/25638875

Answer:

X=10

Step-by-step explanation:

23-3=20

20÷2= 10

2(10)+3=23

Answer:

x = -6 ; y = 11

x = 3 ; y = 5

x = 15 ; y = -3

x = -12 ; y = 15

Step-by-step explanation:

y = -(⅔)x + 7

x = -6

y = -(⅔)(-6) + 7

y = 11

5 = -(⅔)x + 7

-2 = -(⅔)x

x = 3

y = -(⅔)(15) + 7

y = -3

15 = -(⅔)x + 7

8 = -(⅔)x

x = -12

Answer:

cant get an exact answer this is the best ur gonna get 3.675e+17

Step-by-step explanation:

Answer:

9, -2

Step-by-step explanation:

right on edg 2020

Answer:

-1.4

Step-by-step explanation:

h(2) = h(2-1) + 1.8

= h(1) + 1.8

= -5 + 1.8

= -3.2

h(3) = h(3-1) + 1.8

= h(2) + 1.8

= -3.2 + 1.8

= -1.4

As per the given expression h(n)=h(n−1)+1.8, then the value of h(3) is -1.4.

In this explanation, we will calculate the value of h(3) using the given recursive formula h(n) = h(n-1) + 1.8 with the initial condition h(1) = -5. We will follow the iterative approach to find the value of h(3) by step-by-step calculations.

We are given the recursive formula h(n) = h(n-1) + 1.8, where h(1) = -5. Let's find the value of h(3) using this formula.

Step 1: Calculate h(2)

To find h(2), we use the recursive formula:

h(2) = h(1) + 1.8

h(2) = -5 + 1.8

h(2) = -3.2

Step 2: Calculate h(3)

Now, to find h(3), we again use the recursive formula:

h(3) = h(2) + 1.8

h(3) = -3.2 + 1.8

h(3) = -1.4

To know more about expression here

https://brainly.com/question/14083225

#SPJ2

Answer:

343 cubic inches

Answer:

V=343

Step-by-step explanation:

The formula for surface area is SA=6s^2. The formula for volume is V=s^3. Plugging in the surface area and solving for s in the first one gives you s=✓(294/6). This results in a value of 7 for the s or side length. Cubing this gives you the volume.

V=7^3

V=343