The table shows input and output values of the function y = x^2 + 12x – 2. What is an approximate solution of the equation x^2 + 12x – 2 = 0?

Answers

Answer 1

The following exercises try to calculate the variation rate of a quantity when the variation rate of another quantity related to it is known. In this type of exercise, the "variation rate" is interpreted as a derivative and, in most cases, it is enough to use the chain rule to obtain what is requested. You have to choose the units according to the data of the problem; For example, if a volume is measured in liters, we will have to measure lengths with decimeters.
Exercise 1. How fast does the level of the water contained in a cylindrical tank drop if we are emptying it at a rate of 3000 liters per minute?
Solution
Let r be the radius of the cylinder and h be the height measured in decimeters. Let V(t) be the volume of water, measured in liters (=dcm3), that is in the cylinder at time t measured in minutes. The information they give us is a variation rate
V(t + 1) − V(t) = −3000 liters per minute
In this type of exercise, the variation rate is interpreted as a derivative: V ′(t) = −3000. Notice that V(t + to) − V(to) u V′(to)t, so the interpretation is reasonable. The negative sign of the derivative is required since the volume decreases with time. Since the radius is constant but the height of the water depends on time, we have
and we deduce therefore
V(t) = πr2h(t)
V′(t) = −3000 = πr2h′(t)
h′(t) = −3000 decimeters per minute πr2
If we express the measurements in meters, then h ′ (t) = − 3 meters per minute. πr2
Exercise 2. A point P moves on the part of the parabola x = y 2 situated in the first quadrant in such a way that its x coordinate is increasing at a rate of 5 cm/sg. Find the speed at which point P recedes from the origin when x = 9.
Miguel Martín and Javier Pérez (University of Granada)

Solved exercises chapter 2 2 Solution
Let (x(t), y(t)) be the coordinates, measured in centimeters, of the point P at the instant t measured in seconds. They tell us that y(t) > 0 and that x(t) = y(t)2. The distance from point P to the origin is given by f (t) = px(t)2 + y(t)2 , so
′ x(t)x ′(t) + y(t)y ′(t) f (t) = px(t)2 + y(t)2
What we are asked for is f ′(to) knowing that x(to) = 9. In this case it must be y(to) = 3. We also know x′(t) = 5 (cm/sg). With this it is easy to deduce the value of y′(to) = x′(to) = 5. Finally,
2y(to) 6
′ x(to)x′(to)+y(to)y′(to) 45+3(5/6) 95
f (to)= px(to)2+y(to)2 = 81+9 =6√10 cm/s sorry is a lot

Related Questions

HELP PLS GIVE THE ANSWER

Answers

Answer:

y=1.5x

Step-by-step explanation:

2 times 1.5=3 sooooooo

y=1.5x ( i need points(

Which equation is shown by the model? Responses A 56 × 14 = 524 5 6 × 1 4 = 5 24 B 56 × 14 = 624 5 6 × 1 4 = 6 24 C 56 × 14 = 520 5 6 × 1 4 = 5 20 D 56 × 14 = 610 5 6 × 1 4 = 6 10 Question 2 Choose all of the equations that are correct. Responses A 34 × 15 = 320 3 4 × 1 5 = 3 20 B 47 × 23 = 821 4 7 × 2 3 = 8 21 C 27 × 25 = 412 2 7 × 2 5 = 4 12 D 35 × 12 = 47 3 5 × 1 2 = 4 7 E 13 × 57 = 521 1 3 × 5 7 = 5 21

Answers

Answer:

The answer is A.

Step-by-step explanation:

The answer is A because 5/6 x 1/4 = 5/24

No it’s B not A it’s B B B B B B B B B B B B B B B

A salesperson uses a circle graph to represent shoe sales for one year. The central angle for the portion of the graph that represents running shoes measures 80°. If 200 running shoes were sold, how many shoes were sold?

Thanks! :)

Answers

Answer:

900. Give Braylist

Step-by-step explanation:

I'm right

To solve the problem, we can use proportions. Since the central angle for running shoes is 80 degrees, we know that the ratio of running shoes sold to total shoes sold is 80/360. This is because the total number of degrees in a circle is 360. Therefore, we can set up the proportion:

80/360 = 200/x

where x is the total number of shoes sold. Solving for x, we get:

x = (360 * 200)/80

x = 900

Therefore, the total number of shoes sold is 900.

Tell how many terms the expression has.

200 plus left parenthesis 5 times 3 right parenthesis minus 30 plus 3

There is/are term(s).

Answers

Answer:

There are 4 terms in the expression 200+(5∗3)−30+3. The terms are 200, 5×3, −30, and 3.

A term is a single number or variable, or a product or quotient of numbers and variables. In this expression, each of the numbers 200, 5, 3, and −30 is a term. The product 5×3 is also a term.

The terms are separated by addition and subtraction signs. The expression is evaluated by performing the operations in parentheses first, then the multiplication and division, and finally the addition and subtraction.

Step-by-step explanation:

i don't really get this and i don't have time to get it sooo can someone help? also there's one more problem after

Answers

Answer:

1) 172.8 square yd

2) 195.6 square in

Step-by-step explanation:

1) (6*6) + 4(0.5*6*11.4)=36+136.8=172.8

2) (0.5*8*6.9)=27.6

0.5*8*14=56

56*3=168

168+27.6=195.6

172.8. Square yard
195.6 square inch

Can anyone help me with these questions?
Circumference of a circle ( Pi )

Answers

Answer: It is solved! :)

Step-by-step explanation:

1. 18.85 or 18.9 if rounded

2. 31.42

3. 6.28

4. 25.13

5. 31.42

6. 18.85

7. 6.28

8. 43.98 or 44

9. 94.25 or 94.3

10. 12.57 or 12.6

I will show work with my answers (PLEASE MARK ME BRAINLIEST I SPENT 2 HOURS )

INFO: Here is the formula I will be using: C = 2 • π • r OR R = D ÷ 2 (some questions I will use diameter to find radius). (C = Circumference, π = a Greek letter used to represent a large number, r = radius is the line extending from the middle to the end, D is diameter, [] = separation).

1) C = 2 • π • 3 [] C = 18.84956

2) R = 10 ÷ 2 = 5 [] C = 2 • π • 5 [] C = 31.41593

3) R = 2 ÷ 2 = 1 [] C = 2 • π • 1 [] C = 6.28319

4) R = 8 ÷ 2 = 4 [] C = 2 • π • 4 [] C = 25.13274

5) C = 2 • π • 5 [] C = 31.41593

6) R = 6 ÷ 2 = 3 [] C = 2 • π • 3 [] C = 18.84956

7) C = 2 • π • 1 [] C = 6.28319

8) R = 14 ÷ 2 = 7 [] C = 2 • π • 7 [] C = 43.9823

9) C = 2 • π • 15 [] C = 94.24778

10) R = 4 ÷ 2 = 2 [] C = 2 • π • 2 [] C = 12.56637

—————

Please remember to revise this and make it in your own words if you want! I hope this helps you. -Doodle

—————

in a game, if you roll a 1 on a 6-sided number cube, you lose a turn.
(a) What is the probability that you roll a 1? Explain your reasoning.
(b) What is the probability that you either roll a 1 or do not roll a one? Explain your reasoning.
(c) What is the probability that you don't roll a 1? Explain your reasoning.

Answer:

Answers

(a) The probability of rolling a 1 on a 6-sided number cube is 1/6. There is only one way to roll a 1, and there are six possible outcomes.
(b) The probability of rolling a 1 or not rolling a 1 is 1. There are only two possible outcomes, and one of them must occur.
(c) The probability of not rolling a 1 is 5/6. There are five ways to not roll a 1 (rolling a 2, 3, 4, 5, or 6), and there are six possible outcomes.

Answer:

(a) The probability of rolling a 1 on a 6-sided number cube is

1/6

. This is because there is 1 outcome that results in a 1 (rolling a 1) and there are 6 total possible outcomes.

(b) The probability that you either roll a 1 or do not roll a 1 is 1. This is because there are no other possible outcomes. You either roll a 1 or you don't.

. This is because there are 5 outcomes that do not result in a 1 (rolling a 2, 3, 4, 5, or 6) and there are 6 total possible outcomes.

Step-by-step explanation:

Please help im so confused and I don't want to ask my teacher because I think he hates me :')

Answers

Answer:

2 1/4 < 2 1/2 < 2 2/3

Step-by-step explanation:

2 1/4 Is less than 2 1/2, 2 1/2 is less then 2 2/3, and 2 2/3 is greater than all of them

17 POINTS
Solve the following absolute value inequality

Answers

Answer:

x ⩽ -7

x ⩾ -11

Step-by-step explanation:

5|x+9| ⩽ 10

To find the absolute value, we need to consider the negative value.

-10 ⩽ 5(x+9) ⩽ 10

Multiply inside the parenthesis with 5.

-10 ⩽ 5x + 45 ⩽ 10

Subtract 45 from all expressions.

-55 ⩽ 5x ⩽ -35

Divide the expressions with 5.

-11 ⩽ x ⩽ -7

-11< (or equal to) x <( or equal to) -7

aka
x>-11
x<-7

Money and Decimal Skills

1) Your best friend bought a regular sundae and a quadruple scoop. How much money did he spend?

2) You bought a double scoop and your coach bought a quadruple scoop. How much more did the coach spend?

3) Your teacher bought 32 triple scoops for her fellow teachers. How much money did she spend?

4) The soccer coach bought 11 super sundaes for the team. How much money did it cost the coach?

5) A group of 9 teenagers had a bill for $49.59 at Fantastic Flavors. They decided to split the cost evenly. How much did it cost each person?

6) A team of 12 basketball players had a bill of $60.48 at Forty-one Flavors. They decided to split the cost evenly. How much did each player spend?

7) Your mother bought 13 quadruple scoops for a birthday party. How much was her bill?

8) How much less does it cost to buy a single scoop than a quadruple scoop?

9) What is the total cost of a single scoop, a triple scoop, a super sundae, and a cola float?

10) How much would it cost to buy one of everything on the menu?

Answers

1) 2.79+2.25=5.04
2)2.25-1.69=0.56
3)32 times 1.99=63.68
4)11 times 3.95= 43.45
5)49.59 divided by 9=5.51
6)60.48 divided by 12=5.04
7)13 times 2.25=29.25
8)2.25-1.29=0.96
9)1.29+1.99+3.95+2.90=10.13
10)1.29+1.69+1.99+2.25+2.79+3.29+3.95+2.90=20.15

7+4+ c to the 2 power -5c when c=8

Answers

Answer:

Step-by-step explanation:

7+4+c^2-5c=

11+8^2-(5*8)=

11+64-40=

Answer:

When c=8, 7+4+c^2-5c becomes 7+4+(8^2)-(5*8)=7+4+64-40=71.

Is there anything else I can help you with?

Step-by-step explanation:

30 POINTS! ANSWER THE QUESTION SHOWN IN THE IMAGE WITH CLEAR ANSWER

Answers

X=(a-y)/2, x=b-y
Y=a-2x, y=b-x

X=2x+y-a*4
Find like terms
Y=6-4- (-3)* 3/5
Then see what’s the same or look at what is similar. If a letter is by itself, it equals one

Answer pleaseeeeeeee!!!!!!

Answers

The answer is C, 1/16

The answer is C obviously

Which of the following graphs shows all the possible values for a number that is at least 6?

a) Number line with closed circle on 6 and shading to the left.

b) Number line with closed circle on 6 and shading to the right.

c) Number line with open circle on 6 and shading to the left.

d) Number line with open circle on 6 and shading to the right.

Answers

The correct answer is:

b) Number line with closed circle on 6 and shading to the right.

This graph represents all the possible values for a number that is at least 6. The closed circle at 6 indicates that 6 is included in the possible values, and the shading to the right indicates that the values extend beyond 6 in the positive direction.

Which is the AREA of the composite figure?

— 672 cm
— 864 cm
— 936 cm
— 1,200 cm

Answers

ANSWER: 864
First you do 12 times 12 that is 144 then you divide it by 2 because it is a triangle
Then 12 times 44 and get 500 something and divide it by 2 because it is also a triangle and get 264 then you subtract 56 and 12 and get 44 and times that by 12 and get 528 then you add up all the numbers and should get 864

thr answer is 864 because

Earl made a 1/2 pan of brownies using 2/3 cup of sugar how much. sugar will it take for a whole pan of brownies

Answers

If Earl made a 1/2 pan of brownies using 2/3 cup of sugar, we can use a proportion to find out how much sugar he will need for a whole pan of brownies.

Let's call the amount of sugar needed for a whole pan of brownies "x". Since a whole pan is twice the size of a half pan, we can set up the proportion:

1/2 pan / 2/3 cup sugar = 1 whole pan / x cups sugar

To solve for x, we can cross-multiply and simplify:

1/2 pan * x cups sugar = 2/3 cup sugar * 1 whole pan
x/2 = 2/3
x = (2/3) * 2
x = 4/3

Therefore, Earl will need 4/3 cups of sugar for a whole pan of brownies. This can be simplified to 1 and 1/3 cups of sugar

Answer:

4/3 Cups of Sugar

which is the AREA of the composite figure?

sorry about the drawing, i tried as hard as i could to draw it correctly

— 672 cm

— 864 cm

— 936 cm

— 1,200 cm

Answers

I don't really understand because the picture doesn't match the measurements.

⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️

Answers

Step-by-step explanation:

Calculates 2 sides based on 3 given angles and 1 side.

a = c·sin(A)/sin(C) = 3.55399

b = c·sin(B)/sin(C) = 5.44503

Side a = 3.55399

Side b = 5.44503

Side c = 7

ASAP! answer question down below please and thank you!

Answers

Answer:

105 square inches

Step-by-step explanation:

area of a triangle = 1/2( base * height)

The base is 5 and the height is 8.

= 1/2 ( 5 *8)

= 1/2(40)

= 20

The area of each triangle = 20 sq inches

So 4 triangles x 20 sq inches each = 80 sq inches.

The area of the square is 5 x 5 = 25 sq inches.

Add them together.

80 + 25 = 105 square inches

The answer is 105 btw

what is the value of x

Answers

2x + 10 + 5x + 10 + 90 = 180 (add up all the angles and since it’s a triangle it must equal 180)
7x = 70 (add the like terms)
x = 10 (divide both sides by 7)

90+(2x+10)+(5x+10)= 180
110+7x=180
7x=70
x=10

Xin recorded the grade-level and instrument of everyone in the middle school School of Rock below.

Answers

Answer:

13/35

Step-by-step explanation:

Probability determines the likelihood of an event happening.

Since we are not looking at the 7th Graders list, let's focus on the list on 8th Graders.

Given:

8th grade

Guitar - 4 students

Bass - 13 students

Drums - 13 students

Keyboard - 5 students

Since we are trying to find the probability of an eighth grader chosen at random to play the drums, let's turn our attention to how many students actually play the drums.

13 students play the drums.

In order to find the probability of a student chosen at random who plays the drums, we have to find how many students play the drums (which we already found) out of the total amount of students there are in that grade/section. Summing up, probability = the amount of favorable cases divided by the amount of possible cases.

Let's use this formula:

P(A) = n/N

Where "P(A)" stands for the probability of the event "A". And "n" represents the # of favorable outcomes and "N" represents the # of total possible outcomes.

Let's find how many students are in 8th grade now by adding all the people who play the musical instruments together:

4 + 13 + 13 + 5

= 35 possible outcomes.

Now let's plug it into the formula:

P(A) = n/N

P(A) = 13/35

13/35 can simplify any further.

The probability of choosing a student who plays the drums at random is 13/35.

What is the surface area of the square pyramid? This includes the square base.

Answers

ANSWER: 360
Why because 6*6*10 is 360
How I got the other 6 is its equivalent to the other side

I think the answer may be 156

This question is reall easy, just plsss help me?! Will give brainliest!!!

Answers

Answer:

Where the question?

Step-by-step explanation:

Answer:

What? Not given question!

Step-by-step explanation:

JUST MARK ME AS BARINLIEST!

Answer pleaseeeeeeeee

Answers

I believe the answer will be C

The answer is C. 4^16

find the area of the shape below
it is year 7 work can someone help i'll give em 50points for it

Answers

The area is 198.5cm sq

The shape can be divided into a circle of

5cm radius

as diameter is 10cm

radius = d/2

and a rectangle of 12×10 cm dimensions

length is 22-( 2×5) 12cm

and breadth is 10cm

The area of the circle is pi(r square)

which is 3.14×25

= 78.5 cm sq

The area of the rectangle is l×b

which is 12×10

= 120 cm sq

The total area is thus

area of rectangle plus area of circle

which is 198.5cm sq

To learn more about area, please refer

https://brainly.com/question/12736119?utm_source=android&utm_medium=share&utm_campaign=question

and

https://brainly.com/question/18363334?utm_source=android&utm_medium=share&utm_campaign=question

Base your answer to the following question on the following maps and your knowledge of civics:

Two maps of the presidential election results from 2008 are shown. One map shows results by county. The land area of counties won by Republicans is greater than the land area of counties won by Democrats. Another map of Presidential election results by state. Approximately half of the states show Democrat winner, and the other half show a Republican winner. Red areas are focused on center of country.
© 2011 University of Michigan. Creative Commons License

What do these maps tell you about the 2008 election?

The Democrats won the most electoral votes in the election.
The Republicans won the most electoral votes in the election.
The Republicans won the majority of southern U.S. states.
The Democrats won in the majority of U.S. counties.Base your answer to the following question on the following maps and your knowledge of civics:

Two maps of the presidential election results from 2008 are shown. One map shows results by county. The land area of counties won by Republicans is greater than the land area of counties won by Democrats. Another map of Presidential election results by state. Approximately half of the states show Democrat winner, and the other half show a Republican winner. Red areas are focused on center of country.
© 2011 University of Michigan. Creative Commons License

What do these maps tell you about the 2008 election?

The Democrats won the most electoral votes in the election.
The Republicans won the most electoral votes in the election.
The Republicans won the majority of southern U.S. states.
The Democrats won in the majority of U.S. counties.

Answers

The Republicans won the most electoral votes in the election.

Interpreting the presidential election using the map description

From the question, we have the following parameters that can be used in our computation:

Description by county:

Land areas won by Republicans is greater than those won by Democrats.

Description by state:

Democrat winner = approximately half

Republican winner = approximately half

The above means that

The republican won the election

This is because;

When calculated by states, they have the same proportionWhen calculated by county, Republican hold more votes

Hence. The Republicans won the most electoral votes in the election.

Answers

Answer:

bens

Step-by-step explanation:

Step-by-step explanation:

If E is the amount of energy that each full set of panels produces, then ...

3 of james's 5 panels produce 3/5E

4 of Ben's 6 panels produce 4/6E

We can compare these fractions when they have a common denominator.

3/5E = 18/30E . . . . energy from James's panels

4/6E = 20/30E . . . energy from Ben's panels

18/30 < 20/30 . . . . so Ben's panels are producing more energy

If James has 5 and and Ben has 6, that’s 12 then divide that by 3 and it’s 4. Ben

free brainliest whoever helps me!!!

Answers

Answer:

Yes, you are correct. The correct answer is -2.

Step-by-step explanation:

If you do that equation you will get -2 so you are correct.

Number line with open circle on 9 and shading to the left.
Which of the following inequalities best represents the graph above? (3 points)

a) x < 9

b) x > 9

c) x ≤ 9

d) x ≥ 9

Answers

Your answer is: x < 9

Answer:

a) x<9

Step-by-step explanation:

Since x is all the numbers less than 9, but not including 9 (since it's an open circle instead of a filled in one), then:

a) x<9

what could the answer be? I'll give brainliest!

Answers

Answer: 1.5 paintings

Step-by-step explanation:

If he can make 0.75 paintings in 2.5 hrs:

2.5 ---> 0.75

5 ----> (5 x 0.75)/2.5 = 1.5 paintings

1.5 applie the x and y

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