If f(a) = 2a ^ 3 + 3a ^ 2 + 5 , find f(- 2)

Answer:

8

Step-by-step explanation:

10 minus 4 goes first because of BODMAS so thats 6

then 3 times 2 because again bodmas to thats 6

so then its 8 + 6 - 6

can be done in any order not affected by bodmas

6-6 cancels out so the answer is 8

comment if you want an in depth explanation on bodmas lol

[tex]2 \times |12-14|=2 \times |-2| =2\times 2=\boxed{4}[/tex]

Answer:

 the 1st answer is x = 5, the 2nd answer is x = 7, the 3rd answer is x = 4, the 4th answer is: x = 4, the 5th answer is the exact form: x = - 1/3 but the decimal form is: x = - 0.3, the 6th answer is x = 3.

Brainliest?

Answer:

Formulae can be searched for confirmation : compounding interest with regular payments

Step-by-step explanation:

Calculations do it by yourself

Answer:

clchjtdjgdtklgdlnajajhbshsjzsnnjdndmqjsnsn him

The inequality of the given graph in Slope Intercept Form is;

y ≥ 3x - 2

From the attached graph, we see that the boundary line passes through the points (0,-2) and (1,1), and as such the equation of the boundary line is gotten from the general formula;

(y - y1)/(x - x1) = (y2 - y1)/(x2 - x1)

Thus, we have;

(y + 2)/(x - 0) = (1 + 2)/(1 - 0)

(y + 2)/x = 3

y + 2 = 3x

y = 3x - 2

Now, the boundary line is a solid line and the shaded area lies above the boundary line, therefore the sign of inequality must be ≥.

The inequality of the given graph in Slope Intercept Form is;

y ≥ 3x - 2

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The total cost for the increment is $13,000.

There are 5 employee's in Sasha's department. The total amount of increment is $5000. (5 x $1000).

The lowest salary is 32,000. If it is increased to $40,000. The total cost of the increment is $8000 (40,000 - 32,000)

Total cost of the increment = $8000 + $5000 = $13,000

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Answer:

The missing number is 11

Step-by-step explanation:

Step-by-step explanation:

x is the number

8x + 4 = 92 (8 times the number plus 4 is 92).

8x = 88

x = 11

the number is 11.

A function assigns the values. The correct option is D.

A function assigns the value of each element of one set to the other specific element of another set.

The complete options of the question are mentioned in the below image.

The cost  cost c(x) for a taxi ride is given by c(x) =2x + 3.00, where x is the number of minutes. Therefore, the graph of the equation can be drawn as shown below.

Hence, the correct option is D.

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las ecuaciones con fracciones dan:

Sabemos que 5 vueltas es igual a 150 metros, entonces cada vuelta es equivalente a:

v = 150m/5 = 30m

Es decir, cada vuelta equivale a 30 metros.

Ahora simplemente podemos resolver las ecuaciones con fracciones:

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Answer:

1/16

Step-by-step explanation:

F(-4) = 2^-4

= 1/(2^4) = 1/16

Rationalizing the denominator and simplifying the expression, the result is 6√5 + 13.

Option C is the correct answer.

Given that;

[tex]\frac{4+\sqrt{5} }{\sqrt{5} -2}[/tex]

To rationalize the denominator, we multiply the expression by [tex]\frac{\sqrt{5} +2 }{\sqrt{5} +2}[/tex]

Hence

[tex]\frac{4+\sqrt{5} }{\sqrt{5}-2 } *\frac{\sqrt{5} +2 }{\sqrt{5} +2}\\\\\\\frac{(4+\sqrt{5}) }{(\sqrt{5}-2) } \frac{(\sqrt{5} +2) }{(\sqrt{5} +2)}\\\\\\\frac{(4+\sqrt{5})(\sqrt{5}+2) }{\sqrt{5}^2+\sqrt{5}*2-2\sqrt{5} -4 } \\\\\\\frac{(4+\sqrt{5} )(\sqrt{5}+2 )}{1}\\ \\(4+\sqrt{5} )(\sqrt{5}+2 )\\\\4\sqrt{5}+4*2+\sqrt{5}\sqrt{5}+\sqrt{5}*2\\ \\ 4\sqrt{5}+8+5+2\sqrt{5}\\ \\ 6\sqrt{5}+13[/tex]

Rationalizing the denominator and simplifying the expression, the result is 6√5 + 13.

Option C is the correct answer.

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The area of a 2D form is the amount of space within its perimeter. The length of the rectangle is 29 inches and the width of the rectangle is 12 inches.

The area of a 2D form is the amount of space within its perimeter. It is measured in square units such as cm², m², and so on. To find the area of a square formula or another quadrilateral, multiply its length by its width.

Let the width of the sheet be represented by x and the length be represented by y.

Area = x × y

348 = xy

x = 348/y

Perimeter = 2(x+y)

82 = 2(x+y)

41 = x + y

41 = (348/y) + y

0 = y² - 41y + 348

y = 29, 12

Therefore, the length of the rectangle is 29 inches and the width of the rectangle is 12 inches.

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The exponential function that represents the value of Andres’s account after t years is:

A) Va=500(1.025)^t-3 and Va=464.30(1.025)^t

For Henry, it is given by:

[tex]Vh = 500(1.025)^t[/tex]

Andres starts 3 years later than Henry, hence the equation is:

[tex]Va = 500(1.025)^{t - 3}[/tex]

Applying an exponential simplification, we have that:

[tex]Va = 500\frac{1.025^t}{1.025^3} = 464.3(1.025)^t[/tex]

Hence option A is correct.

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Increase in Consumer Credit Card Debt is a debt Crisis , Option A is the correct answer.

What is Consumer Credit Card Debt ?

It is the debt which has been accumulated due to the consumers buying products and services out of the credit card and not paying them back in the period of 90 days.

In USA , the credit card balance is $841 billion in the first quarter of 2022 , which is $15 billion less form the last year but at a significant peak.

This extent of the consumer debt is a debt crisis.

The debt on the bank increases as the debt on the consumer increases , causing in bank recession and a recession brings harm to the economy , It is a crisis situation and need to be handled before it affects the market.

Therefore increase in Consumer Credit Card Debt is a debt Crisis , Option A is the correct answer.

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The number of problems Shelly has to complete is 25 problems

x = 10 + 2/7x

x - 2/7x = 10

(7x-2x)/7 = 10

5/7x = 10

x = 10 ÷ 5/7

= 10 × 7/5

= 70/5

x = 35 problems

So,

Number of problems to complete = Total problems - completed problem

= 35 - 10

= 25 problems

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Answer:

m2

Step-by-step explanation:

the 2nd equation is double the first one and the first one is 1

The area of the parallelogram in the image given is: 42 m².

Area of a parallelogram = base × height

Given the parameters:

Area of the parallelogram = (6)(7)

Area of the parallelogram = 42 m²

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The number sentence that gives the best representation of the plants on the upright stand is 8 × 1 = 8.

Given that the plant is said to be upright, then the number of row would be seen as 1.

The rows of the plants are made up of 2 and the plants in them are said to be 4. Hence we would have 4 x 2 = 8

From here we would conclude that 8 × 1 = 8 is the plants on the upright stand.

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Answer:

A

Step-by-step explanation:

The graph is composed of two different rays.

Also, when x = -2, there is an open hole.

This leaves A as the answer.

Answer:

Use sine rule.

Explanation:

[tex]\begin{tabular}{|c|c|c|c|} \cline{1-2} \multicolumn{2}{|c|}{\bf {SOH CAH TOA Formula's}} \\ \cline{1-2} \cline{1-2} \rm{sine rule} & sin(\theta) \sf = opposite/hypotenuse \\ \cline{1-2} \rm{cosine rule} & cos(\theta) \sf = adjacent/hypotenuse \\\cline{1-2} \rm{tan rule} & tan(\theta) \sf = opposite/adjacent \\ \cline{1-2}\end{tabular}[/tex]

If opposite side of an angle and hypotenuse is given.

Use sine rule: sin(θ) = opposite/hypotenuse

For example:

Given that opposite of the angle is 10 cm and hypotenuse is 20 cm.

To find the angle:

sin(θ) = 10/20

θ = sin⁻¹(10/20)

θ = sin⁻¹(1/2)

θ =  30°

Several ways

You can use sin directly

As

Then you can find Ø from it

Otherwise

You may find adjacent using Pythagorean theorem

Then you can use cos

You may use tan even

The roots of the quadratic equations are -4 and -1

-2x^(2)-3x+4=0

Expand the equation first

[tex]-2(x^2 - 3x + 4) = 0[/tex]

Find two factor that are multiples of -8 and sum up to give -3, the facors are -4 and -1

Replace -3x with 4x and -x

[tex]-2(x^2 -4x + x + 4) = 0[/tex]

Factorize the equation

[tex]-2 (x (x + 4) + 1 (x + 4)[/tex]

We have

2(x + 1) = 0 and 2(x+ 4) = 0

2(x + 1) = 0

2x + 2 = 0

x = -1

2(x+ 4) = 0

2x + 8 = 0

x = -8/2

x = -4

Therefore, the roots of the quadratic equations are -4 and -1

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Answer:

  x + 10

Step-by-step explanation:

You want to know how much money Joyce has if she won a bet with George in which they both started with the same money, both bet 5 cents, and George ended up with x cents.

We assume that both Joyce and George put 5 cents in the pool. After doing that, each had x cents. If Joyce won the 10-cent pool, she now has ...

  x + 10 cents

__

Additional comment

If they both bet against a house, or in a situation where a third party was involved, the amount Joyce ends with depends on the odds of the game, or the percentage collected by the house.

Given that the game is not specified, we have made up the rules.

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In order to determine the coordinates of the circumcenter of triangle DEF with the given vertices, let its circumcenter be P(x, y). Hence, PD = PE = PF.

By squaring all sides of triangle DEF, we have:

PD² = PE² = PF²

From PD² = PE², we have:

(x - 6)² + (y - 0)² = (x - 0)² + (y - 6)²

x² - 12x + 36 + y² = x² + y² - 12y + 36

-12x + 12y = 0    ..........equation 1.

From PE² = PF², we have:

(x - 0)² + (y - 6)² = (x - (-6))² + (y - 0)²

x² + y² - 12y + 36 = (x + 6)² + y²

x² + y² - 12y + 36 = x² + 12x + 36 + y²

-12x - 12y = 0     ..........equation 2.

Solving eqn. 1 and eqn. 2 simultaneously, we have:

x = 0 and y = 0.

Therefore, the coordinates of the circumcenter of triangle DEF with the given vertices are (0, 0).

From PD² = PE², we have:

(x - 0)² + (y - 0)² = (x - 6)² + (y - 0)²

x² + y² = x² - 12y + 36 + y²

12y = 36    

y = 3.

From PE² = PF², we have:

(x - 6)² + (y - 0)² = (x - 0)² + (y - 4)²

x² - 12x + 36 + y² = x² + y² - 8y + 16

-12x - 8y = -20    

-12x - 8(3) = -20

-12x - 24 = -20

12x = -4

x = -1/3.

Therefore, the coordinates of the circumcenter of triangle DEF with the given vertices are (-1/3, 3).

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Answer:

4.95

Step-by-step explanation:

85% of 33 = 28.5

33 - 28.5 = 4.5

What I gather from the question is that [tex]X[/tex] has second moment [tex]E(X^2)=81[/tex] and variance [tex]V(X) = 58[/tex], and you're asked to find the expectation and variance of the random variable [tex]Y=2X+10[/tex].

From the given second moment and variance, we find the expectation of [tex]X[/tex] :

[tex]V(X) = E(X^2) - E(X)^2 \implies E(X) = \sqrt{E(X^2) - V(X)} = \sqrt{23}[/tex]

Expectation is linear, so

[tex]E(Y) = E(2X+10) = 2 E(X) + 10 = \boxed{2\sqrt{23} + 10}[/tex]

Using the same variance identity, we have

[tex]V(Y) = V(2X+10) = E((2X+10)^2) - E(2X+10)^2[/tex]

and

[tex]E((2X+10)^2) = E(4X^2 + 40X + 100) = 4E(X^2) + 40E(X) + 100 = 424 + 40\sqrt{23}[/tex]

so that

[tex]V(Y) = V(2X+10) = (424 + 40\sqrt{23}) - (2\sqrt{23} + 10)^2 = \boxed{232}[/tex]

Alternatively, we can use the identity

[tex]V(aX+b) = a^2 V(X) \implies V(2X+10) = 4V(X) = 232[/tex]

Answer: 10

Step-by-step explanation:

I just took the test!! :)

The expression for the angle m∠RST from the given bisctor is; 6x - 18

From the given image in the attachment we are given that;

SQ bisects ∠TSR

m ∠RSQ = 3x - 9

Now, since  SQ is a bisector of ∠TSR, we can say that

m∠RST = 2 * m∠RSQ

Thus angle RST is expressed as;

m∠RST = 2(3x - 9)

m∠RST = 6x - 18

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The amount in lee's mutual fund account after 8 years will be $7600

Given: Principal amount (P) = $5000,

Time (t) = 10 years,

Rate of interest (r) = 6.5% per year

To find: lee's mutual fund account after only 8 years

We know that Simple interest (SI) is given by:

[tex]S.I = \frac{PTR}{100}[/tex].......(1)

So, by using equation (1) money (P') in a mutual fund account after 8 years will be

[tex]P'=P+\frac{PTR}{100}[/tex]

[tex]=5000+\frac{5000*6.5*8}{100}[/tex]

[tex]= 5000+50*6.5*8[/tex]

= 5000+2600

= 7600

Hence, the amount in lee's mutual fund account after 8 years will be $7600

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The mistaken assumption is that the customer thinks the shoes are back to their original price.

The assumption is wrong because the price of the shoe is now lower than $150.

The cost of the shoe now is $126.

In order to retain the price of $150, the percentage decrease should have been 28.6%.

Price of the shoe after it was increased : 1.4 x 150 = 210

Price of the shoe after it was decreases: (1 - 0.4) x 210

0.6 x 210 = $126

The percentage the price should be decreased for the price to be back to $150 = (150 / 210) - 1 = 28.9%

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