In a class of 28 students, 15 earned an A on the final exam, 10 earned an A for the entire course, and 7 earned an A for both final exam and the entire course. What is the probability that a randomly selected student in this class did not earn an A on the final exam and did not earn an A for the entire course?

Answer:

4 hours

Step-by-step explanation:

Let the size of  whole wall be x.

Given that

Ralph painted 1/6 of a wall in 2/3 hours

thus, writing it in mathematical form we have,

time taken to pain 1/6 of x = 2/3 hours

=>time taken to pain x/6 wall = 2/3 hours

since, we have taken size as x so to find time to pain x size of wall ,

we divide both side by 6

=>time taken to pain x/6 * 6 wall = 2/3 *6 hours

=> time taken to pain x wall = 4 hours

Thus, It will take 4 hours to paint whole wall

After buying the cookies, they both lost money but still share the same balance because in the question it says they went to the store together and decided to buy some cookies, splitting they cost equally, Key word Equally. since they spent the same amount as one another they still share the same balance.

Answer:

  [4 over x equals 5 over 10]  

Solve for x, so you need to isolate/get x by itself in the equation.

      Multiply x on both sides

      Multiply the inverse of 5/10, which is 10/5, to get rid of the fraction and get x by itself

8 = x

Step-by-step explanation:

Answer:

no solutions

Step-by-step explanation:

-3(x-20)=5-3x

-3x+60=5-3x add 3x to both sides

60=5 not true

no solutions

Answer:

no solution

Step-by-step explanation:

Let's solve your equation step-by-step.

−3(x−20)=5−3x

Step 1: Simplify both sides of the equation.

−3(x−20)=5−3x

(−3)(x)+(−3)(−20)=5+−3x(Distribute)

−3x+60=5+−3x

−3x+60=−3x+5

Step 2: Add 3x to both sides.

−3x+60+3x=−3x+5+3x

60=5

Step 3: Subtract 60 from both sides.

60−60=5−60

0=−55

Answer:

1)     25+7(n-1)

When the above 'n'(hours) is substituted on the equation, it equals up to the right cost.

2)      Given that n represents the no.of bikes, you just plug it in to the equation below.

250+39(n-1)

= 250+39(20-1)

= 250+39*19

= 250+741

= 991

Answer:

m∠STU is 20°

Step-by-step explanation:

If a ray bisects an angle, then it divides it into two equal angles in measures and the measure of each one is half the measure of this angle

∵ Ray TV bisects ∠STU

→ That means it divides it into two angles STV and UTV

∴ m∠STV = m∠UTV = [tex]\frac{1}{2}[/tex] m∠STU

∵ m∠STV = ([tex]\frac{1}{4}[/tex]x + 8)°

∴ m∠UTV = (x + 2)°

→ Equate them

∴ x + 2 = [tex]\frac{1}{4}[/tex]x + 8

→ Subtract 2 from both sides

∴ x + 2 - 2 =  [tex]\frac{1}{4}[/tex]x + 8 - 2

∴ x =  [tex]\frac{1}{4}[/tex]x + 6

→ Subtract  [tex]\frac{1}{4}[/tex]x from both sides

∴ x -  [tex]\frac{1}{4}[/tex]x =  [tex]\frac{1}{4}[/tex]x -  [tex]\frac{1}{4}[/tex]x + 6

∴  [tex]\frac{3}{4}[/tex]x = 6

→ Divide both sides by  [tex]\frac{3}{4}[/tex] to find x

∴ x = 8

→ Substitute the value of x in the measure of any given angle

∵ m∠UTV = 8 + 2 = 10°

∵ m∠UTV =  [tex]\frac{1}{2}[/tex] m∠STU

∴ 10° =  [tex]\frac{1}{2}[/tex] m∠STU

→ Multiply both sides by 2

∴ 20° = m∠STU

∴ The measure of angle STU is 20°

Answer:

750

Step-by-step explanation:

Just divide 90 by 0.12 then it gives you 750. If you want to check it you can multiply 750 by 0.12 and it gives you 90. I got 0.12 from 12% since they're the same thing.

Answer: 1,009,900

Step-by-step explanation:

Answer:

that equals to= 9901.1

Step-by-step explanation:

i added and multiplyed all of that

Answer:

B = 3.75t

Step-by-step explanation:

Given;

initial charge of Arianna's phone = 45%

the charge remaining in Arianna battery = 15%

If after 4hours of leaving her house, the battery had 15% remaining battery life, then the battery is discharging at the rate of ( 15% / 4hours) 3.75% per hour.

Thus, the charge remaining in Arianna's battery after she left her house is given by;

B = 3.75t

where;

t is time in hours

B is the percentage of charge remaining

Answer:

[tex]\huge\boxed{m=-3}[/tex]

Step-by-step explanation:

The standard form:

[tex]Ax+By=C[/tex]

The slope-intercept form:

[tex]y=mx+b[/tex]

[tex]m[/tex] - slope

[tex]m=-\dfrac{A}{B}\\\\-6x-2y=9\to A=-6;\ B=-2\\\\m=-\dfrac{-6}{-2}=-3[/tex]

[tex]-6x-2y=9[/tex]

convert to the slope intercept form:

[tex]-6x-2y=9\qquad|\txt{add}\ 6x\ \text{to the both sides}\\\\-2y=6x+9\qquad|\text{divide both sides by (-2)}\\\\y=-3x-4.5\to m=-3[/tex]

Answer:

14,508

I hope this helps!

Answer: B. 4/5 cups.

Step-by-step explanation:

Ratio number of--> chocolate chips : dozens of cookies made

                           -->               4           :           5

The question ask for 1 dozen of cookies. In the ratio above, it states for 5 dozens of cookies.

Our new ratio would be:

Chocolate chips: dozens of cookies made

                    x     :         1

we turn the 5 in the right side of ratio by dividing by 5 so we must do the same for other side of ratio by dividing 5 with 4.

x=4/5

hence answer is B. 4/5 cups

...to be honest the question si worded the best but i assume this is what it means.

Answer:

ITS J because the Mlimeters are suppose to be on the other side

Step-by-step explanation:

Answer:

Okay

Step-by-step explanation:

Answer:

Okay Stay. I will stream it. Nice to meet you. I am Nancy.

Answer:

−x+y+7

Step-by-step explanation:

Answer:

14.4 × 10^13

Step-by-step explanation:

.........

Answer:

[tex]a=\frac{3(B-9)}{q}[/tex]

Step-by-step explanation:

Step 1: Write equation

[tex]B=9+\frac{1}{3} qa[/tex]

Step 2: Solve for a

Answer:  more than y :    

                     y + 6

3 times a number:

x ← a number    

                          3x

5 less than the product of 10 and c :

10c   ← the product of 10 and c

                                        10c - 5

14 more than 6 times t :

6t  ← six times t

                       6t + 14

The sum of x and y is 18:

x+y    ← the sum of x and y

                                 x + y = 18

A number minus 12 is y:

x - a number

                  x - 12 = y              

Answer:

See below

Step-by-step explanation:

Here is translation for you

5 less than the product of 10 and c

14 more than 6 times t

The sum of x and y is 18

A number minus 12 is 17

Answer:

225

Step-by-step explanation:

The formula is a^2.

Where a is the side

So, 15^2

= 15x15

=225

Answer: 84

Step-by-step explanation: 252 divided by 3 = 84

Answer:

Step-by-step explanation:

Answer:yes

Step-by-step explanation:

Answer:

x= 7    x = ±√3

Step-by-step explanation:

h(x)=x^3-7x^2-3x+21

Factor by grouping

h(x) = x^2( x-7)  -3 (x-7)

Factor out an (x-7)

h(x) = (x-7)  ( x^2 -3)

Using the zero product property

0= (x-7)  ( x^2 -3)

x-7 =0     x^2 -3 =0

x=7     x^2 =3

x= 7    x = ±√3

Answer: The wheel make 315 complete revolutions in one minute

Step-by-step explanation: Given speed of convertible =45 miles/hr

To answer this question you will need to know how many inches the car travels Per minute.

1. To find this out you will first divide 45 miles by 60 to get the number of miles per minute.

The convertible travels 0.75 mi./min.

2. Next you will convert this number of miles to inches.

There are 63,360 inches per mile.

0.75 x 63360 = 47520 inches per minute.

3. You then need to find the distance the wheel travels in one rotation. You will need to find the circumference of the wheel.

C = pi x d

3.14 x 48

C = 150.72 inches

Each rotation is about 150.72 inches.

4. Finally, divide the total distance traveled in a minute by the circumference(distance of one rotation) to get the total number of rotations in a minute.

47520/150.72 is about 315.3 rotations per minute.

Answer: it’s 315.3

Step-by-step explanation: A convertible is traveling at 45 miles per hour, and its wheels have a diameter of 48 inches. How many complete revolutions do the wheels make in one minute?

rev/min

Answer:

Step-by-step explanation:

Hey, hope you're having a great day. :)

The floor of the round hut suggests that this is a cylinder, so.

Lets assess the formula.

A = 3.14 x r^2

A = 3.14 x 2^2

A = 3.14 x 4

A = 12.56.

Hope this helps!

Answer:

(-3x²+5x-2)-2(x²-2x-1)=

-3x²+5x-2-2x²+4x+2=

-5x²+9x, so b, the coefficient of the x term, is 9.

(a=-5 and c=0)

answered Sep 9, 2019 by Rod Top Rated User (795k points)

Step-by-step explanation:

Value of b will be 9

In algebra , a quadratic equation is any equation that can be rearranged in standard form as ax^2 + b x + c =0 where  x represent unknown and a, b and c are constants .

using algebraic functions , solving given equation

-3x^2 + 5x -2 -2x^2 + 4x + 2

-5x^2 + 9x +0                                       equation 1

now , comparing simplified  equation 1 with general quadratic equation (ax^2 +b x +c ), we get

a=-5

b=9

c=0

so, value of b = 9

Lets learn more about quadratic equations

https://brainly.com/question/2263981?referrer=searchResults

#SPJ2

Answer:6 and 2

Step-by-step explanation:

Answer:

The answer is 6 by 2

Step-by-step explanation:

The perimiter is the total of the sides. So, you have to find out the values of the sides of the rectangle using the number 16. Its a rectangle, and the are is 12. So, you can find that it is 6 & 2.

Answer:

B=C/y−Ax/y

Step-by-step explanation:

Answer:

Hello there!^^

Step-by-step explanation:

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~~~~~~~~~~~~~~~~~~~~~~~~~~~

→ 1. 2x-1=15

→ 2. 2x=15+1

→ 3. 2x=16

→ 4. x = 16/2

→ 5. x = 8

Answer: x = 8

Hence, x would equal to 8 (eight)

Your fellow brainly user: xCherryxUwU

#Thanks!

⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒

Answer:

A. One real solution

Step-by-step explanation:

The discriminant is used to find the number of real solutions to a quadratic equation.

If the discriminant is greater than 0, there are two real solutions.

If the discriminant is equal to 0, there is one real solution.

If the discriminant is less than 0, there are no real solutions.

All quadratic equations have the format:

ax^2+bx+c

Therefore our values for a, b and c are the following:

a = 4

b = -12

c = 9

Therefore the discriminant is:

(-12)^2-4(4)(9)

144-144 = 0

The discriminant is equal to 0, so there is one real solution (Option A).

Hope this helped!