Solve the equation:
x – x² – 12x = 0

Answer:

k = 30

Step-by-step explanation:

[tex]\frac{10}{3}=\frac{k}{9}\\\\\frac{k}{9}=\frac{10}{3}\\\\k=\frac{10}{3}*9\\\\k=10*3=30[/tex]

Answer:

k = 30

Step-by-step explanation:

[tex]\frac{10}{3}[/tex] = [tex]\frac{k}{9}[/tex]

We can easily solve this by cross multiplying. Multiply 10 by 9, and multiply the variable (k) by 3.

10 x 9 = 90

3 x k = 3k

These two (90 and 3k) are equal to one another and thus can both be set up into an equation.

3k = 90

Solve for k.

3k/3 = 90/3

k = 30

Answer:

54% or 15/28

Step-by-step explanation:

You find the sum of 15 and 13 to get 28. 15/28 = 53.5 If you round you get 54%.

Answer:

b = 10

Step-by-step explanation:

Divide 20 by 2 to get b by itself:

20/2 = b

10 = b

MARK AS BRAINLIEST!

Answer:

B=10

Step-by-step explanation:

2(b)=20

2(10)=20

Or

2b÷2=20÷2

B=10

Answer:

9+10 equals 21

Step-by-step explanation:

Just bc im big brain

Answer:

35

Step-by-step explanation:

60 x 70 ÷ 50 yyyyyygsgsgsvsvshsh

Answer:

784

Step-by-step explanation:

I’m pretty sure I did this right I just multiplied them

Final answer:

The rock takes approximately 2.032 seconds to reach the ground.

Explanation:

The height of the rock can be modeled by the equation h(t) = -16t² + 10t + 100, where h(t) is the height of the rock and t is the time in seconds. To find the time it takes for the rock to reach the ground, we need to solve the equation when h(t) is equal to zero. We can do this by setting the equation equal to zero and using the quadratic formula.

Using the quadratic formula, we get: [tex]t = (-b \± \sqrt(b^2 - 4ac))/(2a)[/tex]

Plugging in the values of a, b, and c from the equation, we get: [tex]t = (-10 \± \sqrt{10^2 - 4(-16)(100)/2(-16)[/tex]

Simplifying, we get: [tex]t = (-10 \± \sqrt{100 + 6400/(-32)[/tex]

Continuing to simplify, we get: [tex]t = (-10 \± \sqrt{6500/(-32)}[/tex]

So, it takes approximately 2.032 seconds for the rock to reach the ground.

Answer:

5x+3

Step-by-step explanation:

no for the last problem but yes for the first if u plug in everything

Step-by-step explanation:

I plugged everything in and go the same answer on both sides for the first in but the last one i didn't, so that's a question you should ask your  teacher if there is one near you

Answer:  30 days

Step-by-step explanation:

Working together, E & B get 1/45 of the job done per day

Working alone, C gets 1/x of the job done per day

Working together, E, B, & C get 1/18 of the job done per day.

[tex]EB:\dfrac{1}{45}\qquad C: \dfrac{1}{x}\qquad EBC:\dfrac{1}{18}\\\\\\\\EB+C=EBC\\\\ \dfrac{1}{45}\ +\dfrac{1}{x}=\dfrac{1}{18}\\\\\\(45\cdot 18\cdot x)\bigg(\dfrac{1}{45}+\dfrac{1}{x}=\dfrac{1}{18}\bigg)\\\\\\.\qquad \qquad 18x+810=45x\\\\.\qquad \qquad \qquad 810=27x\\\\.\qquad\qquad \qquad \large\boxed{30=x}[/tex]

Answer:

Step-by-step explanation:

[tex](x+20)=3\\ -20 -20\\x=-17[/tex]

Hope this helps please give brainliest!

Answer:

W ≥ 1.5lb

W = weight of package

Step-by-step explanation:

The key words at least show more than or equal to.

Answer:

[tex] \frac{4}{5} [/tex]

Step-by-step explanation:

Total number of marbles

= 3+2+8+4+3

= 20 marbles

P(not red)

=

[tex] \frac{3 + 2 + 8 + 3}{20} \\ = \frac{16}{20} \\ = \frac{4}{5} [/tex]

or P(not red)

=

[tex]1 - \frac{4}{20} \\ = 1 - \frac{1}{5} \\ = \frac{4}{5} [/tex]

Answer: The width of the  court is 30 feet.

Step-by-step explanation:

We know that the area of a rectangle is given by :-

Area = length x width                                              (1)

Given : A standard-size volleyball court has an area of 1,800 square feet.

The length of the court is 60 feet.

To find : The width of the court.

According to (1) , we have

[tex]1800 = 60\times \text{width}[/tex]

Then,

[tex]\text{Width}=\dfrac{1800}{60}=30[/tex]

Hence, the width of the  court is 30 feet.

Final answer:

The width of a standard-size volleyball court, with an area of 1,800 square feet and a length of 60 feet, is calculated to be 30 feet using the formula for the area of a rectangle.

Explanation:

To find the width of a standard-size volleyball court with an area of 1,800 square feet and a length of 60 feet, we need to use the formula for the area of a rectangle, which is Area = length × width. Since we know the area and the length, we can solve for the width.

Let the width be w feet.

Then, 1,800 sq ft = 60 ft × w ft,

So, w = 1,800 sq ft / 60 ft,

Therefore, w = 30 feet.

The width of the volleyball court is 30 feet.

Answer:

11/12 is Z

Step-by-step explanation:

Do you need the explanation?

The required value of z is 11/12 in the given equation.

A fraction is defined as a numerical representation of a part of a whole that represents a rational number.

The equation is given in the question as:

1 3/4 + z = 2 2/3

We have to determine the value of z in the given equation,

As per the question, we have

⇒ 1 3/4 + z = 2 2/3

Convert the mixed numbers into fractions,

⇒ 7/4 + z = 8/3

Rearrange the terms in the above equation,

⇒ z = 8/3 - 7/4

Take LCM in the term of fractions,

⇒ z = (32 - 21)/12

⇒ z = 11/12

Therefore, the required value of z is 11/12 in the given equation.

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Answer: 6.48 or 6.5 rounded up!

Step-by-step explanation: hope i can help please give brainliest!

just try my answer its

6.48 or 6.5 rounded up!

Answer:

Step-by-step explanation:

surface area=area of sides +area of top and bottom

=2(4+5)×8+2×(4×5)

=2[(9×8)+20]

=2[72+20]

=2×92

=184 m²

The total surface area of the given rectangular prism is square meters.

The surface area of a rectangular prism can be calculated by adding the areas of all its faces.

Given that a rectangular prism with a base 4 m by 5 m and a height 8 m,

The surface area can be calculated as follows:

The surface area = area of sides + area of top and bottom

The surface area = 2(4+5)×8+2×(4×5)

The surface area = 2[(9×8)+20]

The surface area = 2[72+20]

The surface area = 2 × 92

The surface area = 184 m²

Therefore, the total surface area of the rectangular prism is 184 square meters.

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To split a $24.48 lunch bill between Kiran and 3 friends ,,divide the total by 4, resulting in each person paying $6.12.

Kiran and 3 of his friends want to split the lunch bill of $24.48 evenly. Since there are 4 people in total, we simply divide the total bill by 4 to find out how much each person will pay. Here's the step-by-step calculation:

Therefore, each person will pay $6.12 to split the lunch bill of $24.48 equally.

Answer:

D 180°

Step-by-step explanation:

The measure of a straight angle is 180°.

Solution:

Given that,

A sequence is defined by the recursive function:

[tex]f(n+1) = \frac{1}{3} \times f(n)[/tex] ------ eqn 1

Given that,

[tex]f(3) = 9[/tex]

Substitute n = 2 in eqn 1

[tex]f(2 + 1) = \frac{1}{3} \times f(2)\\\\f(3) = \frac{1}{3} \times f(2)\\\\Substitute\ f(3) = 9\\\\9 = \frac{1}{3} \times f(2)\\\\f(2) = 27[/tex]

Substitute n = 1 in eqn 1

[tex]f(1 + 1) = \frac{1}{3} \times f(1)\\\\f(2) = \frac{1}{3} \times f(1)\\\\Substitute\ f(2) = 27\\\\27 = \frac{1}{3} \times f(1)\\\\f(1) = 27 \times 3\\\\f(1) = 81[/tex]

Thus f(1) is 81

Answer:

D 81

Step-by-step explanation:

The measure of angle 3 is 27 degrees.

Step-by-step explanation:

Given,

angle 1 = 27°

Since angle 3 is same as angle 1, the measure of angle 3 is also 27 degrees

angle 3 = 27°.

Answer:

act like you dont care next time keep the volume down

Step-by-step explanation:

Answer:

x = 7y

Step-by-step explanation:

x+8y/4=9y

Multiply each side by 4 to get rid of the fractions

4(x+8y/4)=9y*4

Distribute

4x +8y = 36y

Subtract 8y from each side

4x +8y-8y = 36y-8y

4x = 28y

Divide each side by 4

4x/4 = 28y/4

x = 7y

x+8y/4=9y

Multiply each side by 4

4(x+8y/4)=9y*4

=>4x +8y = 36y

Subtract 8y from each side

=>4x +8y-8y = 36y-8y

=4x = 28y

Divide each side by 4

=>4x/4 = 28y/4

x = 7y

The answers are 15 guests, 7 tables, 24 guests, and 10 tables respectively.

Step-by-step explanation:

2 tables ⇒  6 guests

1 table ⇒ 6/2 = 3 guests

5 tables = 5 × 3 = 15 guests

Number of tables = 21/3 = 7 tables

Number of guests = 8 × 3 = 24 guests

Number of tables = 30/3 = 10 tables

Answer:

100 10's

Step-by-step explanation:

Answer: 6 10$ bills

Step-by-step explanation:

18 (5$) times 6 (10$) = $150

18 + 6 = 24 bills in total ^

Answer:

42%, 3/7, .44

Step-by-step explanation:

what i would do is turn them all into decimals

3/7 is .4285

.44 is already a decimal

42% is .42

Answer: 1.37 and 137/100

Step-by-step explanation:

hope this help make me brainliest plest thanks

Final answer:

137% can be written as the fraction 137/100, which is already simplified. To convert 137% to a decimal, divide 137 by 100 to get the decimal 1.37.

Explanation:

To write 137% as a fraction, you should consider that percent means 'per hundred.' Therefore, 137% can be written as a fraction with a denominator of 100: 137/100, which is already in its simplest form.

To express 137% as a decimal, you divide the numerator by the denominator. In this case, you would divide 137 by 100. This gives you the decimal 1.37, which is the decimal equivalent of 137%.

Understanding these conversions is crucial when working with percentages, and they can often simplify calculations in various mathematical problems.

Answer:

mean= 15.16

2/53

Step-by-step explanation:

addition of all the figures plus the next student divided by 6

Answer:

D. y = 0.8x + 79

Choices:

A.  

y = 79x + 0.8

B.  

y = -0.8x + 79

C.  

y = 79.8x

D.  

y = 0.8x + 79

The following functions represent the cost of a massage as: Cost = 59 + 0.95x

A linear function is defined as an equation in which the highest exponent of the variable is always one.

A one-hour massage at Serenity Spa costs $59 USD. They charge $0.95 per minute for every minute over an hour.

The cost of a massage can be represented by the function:

Cost = 59 + 0.95x

This function states that the cost of the massage is equal to the base cost of $59 plus an additional charge of $0.95 for each minute over an hour (represented by the variable x).

For example, if the massage lasts for 70 minutes (10 minutes over an hour), the cost would be calculated as:

Cost = 59 + 0.95(10) = 59 + 9.5 = $68.50

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Answer:

1/2x15(30+40)

Step-by-step explanation:

Just put this in your calculator