1. Find the value of 3x -2x^2 ; when x = -3. ^ means "power of"

Answers

Answer 1
Answer: -9
Explanation: 3x-2x^2 x=3
We replace each x with 3.
3(3)-2(3)^2
Then we solve the equation using pemdas
3(3)-2(9)
9-18= -9

Related Questions

Each dairy cow in the U.S. produces an average
of 25 quarts of milk per day. Given that there are
quarts in a gallon, how many gallons of milk does a
cow produce?

Answers

there are 4 quarts in a gallon. so 25/4 = 6.25

a cow produces about 6 gallons of milk per day

Luke made 25% of his free throws over the season if he shot 200 free throws how many did he make?

Answers

Based on the number of throws Luke had and the percentage he made, the number he made was 50 throws.

Number of Free Throws Made

There were 200 free throws in the season and Luke was able to make about 25% of them.

The formula to find this is therefore:

= Number of free throws x Percentage made

Solving gives:

= 200 x 25%

= 50 throws

In conclusion, Luke made 50 throws.

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let m>0. match each inequality with its graph. Explain your reasoning.

Answers

Answer:

a. C

b. A

c. B

d. D

Step-by-step explanation:

[tex]a.\ \ \frac{x}{m} < -1 \Longleftrightarrow x < -m[/tex]

Then

The graph that represents the inequality is C.

[tex]b.\ \ \frac{x}{m} > 1 \Longleftrightarrow x > m[/tex]

Then

The graph that represents the inequality is A.

[tex]c.\ \ \frac{x}{m} < 1 \Longleftrightarrow x < m[/tex]

Then

The graph that represents the inequality is B

[tex]d.\ \ -\frac{x}{m} < 1 \Longleftrightarrow -x < m \Longleftrightarrow x > -m[/tex]

Then

The graph that represents the inequality is D.

A ball is launched upwards from a height of 4 feet. The ball’s height as a function of time, in seconds, is modeled by the function h(t)= -16t^2 +80t +4. What is the time interval in which the ball has a height greater than 100 feet?

Answers

Answer:

Between 2 & 3 seconds. Or we can write it as 2<t<3

Step-by-step explanation:

t = elapsed time in seconds

h(t) = height of the ball at time t

So we just need to replace h(t) with 100 and start to solve. In the end, the answer will be t=2, or t=3 or we can write it as 2<t<3. You can check it by plugging in the number into the equation.

You are facing North. Turn 90 degrees left. Turn 180 degrees right. Reverse the direction. Turn 90
degree left Reverse the direction. In which direction are you facing now?
E. East
F. West
G. North
H. South​

Answers

Answer:

i believe that it's north

What is the Decimal equivalent for fraction 4/8

Answers

Answer:

I hope this helps you

Step-by-step explanation:

4/8 = 0.5

Morgan is visiting a city and wants to take a taxi. The driver tells Morgan that they charge per kilometer and
shows this table describing their cost:

Answers

The amount it would cost Morgan to travel 13 km is £32.5

Calculating Cost

From the question, we are to calculate how much it would cost Morgan to travel 13 km

From the given table, we have that

The cost of traveling 5 km is £12.50

and

The cost of traveling 10 km is £25

First, we will determine the cost of traveling 1 km

If the cost of traveling 5 km is £12.50

Then,

The cost of traveling 1 km will be £12.50/5

£12.50/5 = £2.5

The cost of traveling 1 km is £2.5

Now,

If the cost of traveling 1 km is £2.5

Then,

The cost of traveling 13 km will be 13 × £2.5

13 × £2.5 = £32.5

Hence, the amount it would cost Morgan to travel 13 km is £32.5

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please help me asap​

Answers

Answer:

2 5/18

Step-by-step explanation:

It's the last choice

which formula represents a substance that contains covalent bonds 1) LiCl 2)CaCl2 3)K2O 4)CO2​

Answers

Answer:

It is CO2 Number 4

Step-by-step explanation:

Answer:

Step-by-step explanation:

Tessa returned a book to the library 16 days
late. If she was charged $0.35 per day,
what was the total fine?

Answers

Answer:

5.60

Step-by-step explanation:

Answer: $5.60

Step-by-step explanation:

Given:

Tessa did not return her book for 16 daysThe fee per day was $0.35

We must find:

The total cost after 16 days

Let t = total cost.

We will multiply 0.35 by 16 to get the answer.

t = 5.60

A rectangle has a length of 3 1/4 feet and a width of 1 1/3 feet. What is the area of the rectangle?

Answers

Answer:

the answer is simple 4 1/3

Step-by-step explanation:

you can support me with brainliest

Answer:

13/3 or 4 1/3

Step-by-step explanation:

area of rectangle = length * width

3 1/4 feet as an improper fraction is 13/4

1 1/3 feet as an improper fraction is 4/3

length * width

13/4 * 4/3

= 13/3 or 4 1/3

Colin buys a tv
for £800.
It depreciates at a rate of 4% per year.
How much will it be worth in 3 years?
Give your answer to the nearest penny where appropriate.

Answers

The amount of the tv in 3 years which depreciates at a rate of 4% per year is £708 .

Compound interest is interest calculated on the principal and the interest accrued in previous periods. It differs from simple interest where interest is not added to the principal when calculating interest for the next period. In mathematics, compound interest is usually represented by C.I.If the interest is compounded annually, then amount is given by [tex]A=P(1+\frac{r}{100} )^t[/tex]  where " A " = Amount , " R " = annual interest rate , "T" = number of years , " P" is principal amount .

We have given principal amount =  £800 , rate = 4% and time = 3 years .

Putting above values in equation (1) , we get

        [tex]A=800(1-\frac{4}{100} )^3\\A= 800(1 -0.04)^3\\A=800(0.96)^3\\A=800\times 0.88\\A= \£707.78[/tex]

Note that the minus sign is due to depreciation .

On rounding off , amount will be £708 .

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Given b = - 14 which equation is true
A. -28 + 2b = 53
B. 2b + 7 = 20
C. 6/7 + 18 = 16
D. b/2 + 7.4 = 1.4

Answers

Answer:

b/2 + 7.4 = 1.4 thus D. is the answer

Step-by-step explanation:

Solve for b:

b/2 + 7.4 = 1.4

Put each term in b/2 + 7.4 over the common denominator 2: b/2 + 7.4 = b/2 + 14.8/2:

(b/2 + 14.8/2) = 1.4

b/2 + 14.8/2 = (b + 14.8)/2:

((b + 14.8)/2) = 1.4

Multiply both sides of (b + 14.8)/2 = 1.4 by 2:

(2 (b + 14.8))/2 = 2×1.4

(2 (b + 14.8))/2 = 2/2×(b + 14.8) = b + 14.8:

b + 14.8 = 2×1.4

2×1.4 = 2.8:

b + 14.8 = 2.8

Subtract 14.8 from both sides:

b + (14.8 - 14.8) = 2.8 - 14.8

14.8 - 14.8 = 0:

b = 2.8 - 14.8

2.8 - 14.8 = -12:

Answer: b = -12

(4x3−12x2−5)−(−8x2+4x+3)=
find the difference

Answers

Answer:

4x³ - 4x² - 4x - 8

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define expression

(4x³ - 12x² - 5) - (-8x² + 4x + 3)

Step 2: Simplify

Distribute negative:                    4x³ - 12x² - 5 + 8x² - 4x - 3Combine like terms (x²):             4x³ - 4x² - 5 - 4x - 3Combine like terms (Z):              4x³ - 4x² - 4x - 8

What is the approximate area of the circle shown below?

Answers

Answer:

do you have a picture to go with it's?

In the phrase rise over run
what does rise indicate

Answers

Answer:

how far a line goes up

Step-by-step explanation:

rise/run gives the slope of the line

The rise indicates how the line will go up or down. The run indicates how the line will move horizontally

If a person makes $5.00 in 10 minutes, how much can she make in1.5 hours?

Please help due today!!!!!!!

Answers

Answer:

$45

Step-by-step explanation:

Find the equation for the line graph below

Answers

input: find the equation of a line
given two points P = (2,4) and
Q = (9, -1).
The slope of a line passing through the two
points P = (x1, yi) and Q = (x2, y2)
У2 - У
is given by m =
X2 ー X1
We have that x1 = 2, y, = 4, x2 = 9,
У2 = -1.
Plug the given values into the formula for Slope:
m =
(-1) - (4
(9) - (2)
=
-5
7
5
=-+
Now, the y-intercept is b = y, - m • xj (or b = y2 - m • x2, the result is the same).
6=4-(-)・0=
38
7
Finally, the equation of the line can be written
in the form y = mx + b.
y=
5
38

Suppose that the weather forecast indicates a 10% chance that cold weather will reduce the citrus grower’s profit from $100,000 to $85,000 and a 10% chance that cold weather will reduce the profit to $75,000. Should the grower spend $5000 to protect the citrus fruit against the possible bad weather?

Answers

Answer:

We can think in this situation as:

There is 10% (or a probability equal to 0.1) where the citrus grower's profit will be reduced by $15,000

There is 10% (or a probability equal to 0.1) where the citrus grower's profit will be reduced by $25,000

And in the remaining 80% (or a probability equal to 0.8), the profit does not change.

Then the expected value for the total profit can be written as:

EV = $100,000 + ( 0.1*(-$15,000) + 0.1*(-$25,000) + 0.8*$0)

     =  $96,000

In the case where the citrus grower spends $5000 to protect the fruits against possible bad weather, there is a 100% that is profit will not change, but he must pay $5,000

Then his profit will be:

P = $100,000 - $5,000 = $95,000

So in this case, the profit is $1000 less than the expected profit in the prior case. So the scenario where he does not buy the protection has a larger expected profit, which may mean that is better to not buy it (in a straight mathematical point of view)

One also could think that  the values are really close together, so buying the protection does not mean a big change, and increases the security

identify the k-value that makes the relationship shown in the table below proportional.​

Answers

Answer:

The value of k that makes the relationship shown in the table below proportional is [tex]\mathbf{\frac{1}{2}}[/tex]

Step-by-step explanation:

The relation is proportional if [tex]y=kx \:or\:k=\frac{y}{x}[/tex]

Putting values of x and y to find k.

For x =2 and y =1 k is: [tex]k=\frac{y}{x}=\frac{1}{2}[/tex]

For x =4 and y =2 k is: [tex]k=\frac{y}{x}=\frac{2}{4} =\frac{1}{2}[/tex]

For x =6 and y = 3 k is: [tex]k=\frac{y}{x}=\frac{3}{6} =\frac{1}{2}[/tex]

For x = 8 and y = 4 k is: [tex]k=\frac{y}{x}=\frac{4}{8} =\frac{1}{2}[/tex]

For x =10 and y = 5 k is: [tex]k=\frac{y}{x}=\frac{5}{10} =\frac{1}{2}[/tex]

So, The value of k that makes the relationship shown in the table below proportional is [tex]\mathbf{\frac{1}{2}}[/tex]


[tex]f(x) = - 2(x - 4) ^2 + 6[/tex]
what is the vertex of this function ?​

Answers

Answer:

x = 4

Step-by-step explanation:

x = 4 is the vertex of the function.

This is a negative quadratic equation and the vertex is the zero of the function. We set (x - 4) equal to 0 and solve.

x - 4 = 0

x = 4

Your bedroom wall is 150 inches wide. You want to hang two posters, each 27 inches across, with an equal space between each poster and the wall edges.

How many inches of space should you leave between the wall edge and each poster?

Answers

Answer:

32

Step-by-step explanation:

let the space be x

x + 27 + x + 27 + x = 150

3x + 54 = 150

3x = 96

x= 32

i have no question x = 2. apples

Answers

Answer:

ok

Step-by-step explanation:

................................................

2y − 7x + 4x2 + 3y + 7x

A 4x2 − 14x + 5y
B 4x2 − 14x
C 4x2 + 14x + 5y
D 4x2 + 5y

Answers

Answer:

5y + 8

Step-by-step explanation:

Answer is A;

unless you forgot your parentheses are the (2y-7x+4x)(2+3y+7x) then your answer would be different


Look at this triangle.
B
13 cm
A
8 cm
Work out length BC.

Answers

Using the Pythagorean theorem:

BC = sqrt(13^2 - 8^2)

BC - sqrt(169 - 64)

BC = sqrt(105)

The exact dimension is sqrt105

If it needs be be in decimal format, sqrt(105) = 10.24695

Step 3: Estimate the Volume of Each Regularly Shaped Ball
Estimate the volume of each ball. Use the formula
4
V== πr³
where Vis the volume and r is the radius. Record the
volumes in Table A of your Student Guide.
What is the estimated volume of the table tennis ball
cm³
What is the estimated volume of the golf ball?
cm³

Answers

estimated Volume of tennis ball by given data = 38.808 .

estimated Volume of golf ball by given data = 33.523 .

WHAT IS SPHERE ? HOW TO FIND ITS VOLUME ?

In terms of geometry, a sphere is described as a collection of points that are spaced apart by a specific amount. The supplied point is referred to as the sphere's center, and the given distance from the sphere's center to the collection of points that make up the sphere is referred to as the sphere's radius.

Many everyday things, including balls and globes, are spheres. Finding a sphere's radius and entering it into the straightforward formula V = [tex]\frac{4}{3}[/tex]π [tex]r^{3}[/tex] will allow you to determine its volume.

CALCULATION

Given: The radius of the tennis ball is 2.1cm and the radius of the golf ball is 2.0cm. the formula is V=4πr(to the 3rd power) /3 .

To find: Volume of tennis ball and golf ball .

Formula used: V = [tex]\frac{4}{3}[/tex]π [tex]r^{3}[/tex] .

pi(π) =[tex]\frac{22}{7}[/tex] .

We are given that

Radius of the tennis ball = 2.1 cm

radius  of the golf ball =2.0 cm.

We need to find the volume of each ball

So , plugging the given values of radius in above formula

Volume of the tennis = [tex]\frac{4 * 22 * (2.1)^{3} }{3 * 7}[/tex] = 38.808 [tex]cm^{3}[/tex]

On simplification we get, volume of tennis ball = 38.808 [tex]cm^{3}[/tex]

Volume of the golf ball= [tex]\frac{4 * 22 * (2.0)^{3} }{ 3*7}[/tex] = 33.523[tex]cm^{3}[/tex]

On simplification we get, volume of golf ball = 33.523[tex]cm^{3}[/tex]

∴ The volume of tennis ball = 38.808[tex]cm^{3}[/tex]

Volume of golf ball = 33.523[tex]cm^{3}[/tex]

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QUESTION 4 of 10: It is estimated that 32 patrons will attend an event for every $100 spent in advertising. If tickets cost $75, how much can a
promoter expect to increase sales if he spends $25,000 in advertising?

Answers

Answer:

$575000

Step-by-step explanation:

Spend on advertising = $25000

32 patrons per $100

Number of patrons:

25000/100×32 = 8000

Sales amount:

8000×$75 = $600000

Increase in sales excluding advertisement cost:

$600000 - $25000 = $575000

Answer:

$600,000

Step-by-step explanation:

$25,000 / 100 then 250 x 32 then 8,000 x 75 to get $600,000

39 decreased by a number p

Answers

Answer:

mm

Step-by-step explanation:

I don't know sooorryy

Which set of ordered pairs does not represents a fraction

Answers

is there a picture????

Is × = 12 a solution to the equation 6 + × 19?

A. no, because 6 + 12 = 19 is not true

B. yes, because 6 + 12 = 19 is true

C. no, because 6 + 12 = 19 is true

D. yes, because 6 + 12 = 19 is not true​

Answers

A. Is the answer

It equals 18 so it is not true
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